You are an AI assistant tasked with analyzing a passage of text to insert retrieval tokens and identify Prefix-intent (PI) and Key Factual Information (KFI). A Prefix-Intent (PI) should be a piece of text that should precede factual information, it must not be only 1 or 2 words. Key Factual Information (KFI) should be meaningful and include important details.

Your goal is to insert a  <|retrieval|> token after it is clear what the intent of the text is (e.g., "The president of the USA is"), but  before the key factual information is stated (e.g., "Joe Biden"). Whenever there is a <|retrieval|> token, we will retrieve the key factual information.

Here is the passage you will be working with:

<passage>
Adam Darr Adam Darr (29 September 1811 – 2 October 1866) was a German classical guitarist, singer, zither player and composer. Biography Adam Darr was born in Schweinfurt, Germany, and started playing the guitar as a youth. Sometime after the age of 23, he left his hometown of Schweinfurt, performing abroad. Although secondary sources state that he performed for royal courts, no primary sources have been discovered to verify this claim. The first known performance of Darr is in April 1837 as a guitarist/vocalist in an ensemble known as the Bavaria Nature-Singers. It is known that he traveled with this ensemble in Belgium, Denmark, Sweden, Finland, and Estonia. According to Bone (1914), he spent three years in St. Petersburg, Russia, from 1836 to 1839, after which he returned to Germany, where, in Würzburg, he became the private tutor of an English family resident there named Whitbread. It is believed that he performed in Paris, and it has been verified that he performed in Berlin. In Würzburg he met fellow-guitarist Friedrich Brand. Together they formed a duo and for a year or two, they traveled through southern Germany, performing in Munich, Weimar, and elsewhere. At Munich, Darr made the acquaintance of the Grand Duke of Bavaria's court zitherist Johann Petzmayer, who became his zither teacher. After five years of service to the Whitbread family, Darr ended his employment and in 1856 moved to Augsburg. In the last ten years of his life, Darr composed music for the guitar and zither, including songs. During this time he published many works for the zither including his famous method. In the last year of his life, Darr became depressed due to a marital engagement that was terminated, and on 2 October 1866 he committed suicide by drowning himself in the river Lech at Augsburg. Darr was a prolific composer with over 300 known compositions to his name. Most of the known works by Darr are for the zither, he wrote more than 60 works for the guitar and also a respectable comic operetta for men's voices called Robinsonade. Most of Darr's works were not published in his lifetime, which makes dating his music almost impossible. Many manuscripts and most of the printed music is preserved at the Bavarian State Library (Fritz Walter and Gabriele Wiedemann Collection). Selected compositions Guitar solo Andante religioso (Munich: Hauser, 1900) Galopp (Munich, 1907) Sonata: 3 movements published separately in Augsburg by the Freie Vereinigung zur Förderung guter Guitaremusik, 1908 Mein letztes Andante (Augsburg, as above) Guitar duo 15 numbered duos published in Augsburg by the Freie Vereinigung zur Förderung guter Guitaremusik (1905–8) Irenengalopp (Munich: Gitarristische Vereinigung, 1911) Zither Olga-Walzer (Trier: Hoenes, c.1903) Recordings Adam Darr: Romantic German Guitar Duets, performed by John Schneiderman and Hideki Yamaya (guitars). Profil DCD PH13052, CD (2014). Contains: Introduktion & Polonaise; Erinnerung an St. Petersburg; Serenade; Irenengalopp; Introduktion & Rondo; Trauer-Marsch; Einleitung & Walzer; Grosses Adagio und Rondo; duos no. 1 to 14. Gitarrenmusik der deutschen Romantik, performed by David Silvan Weiss (guitar). Vitula, CD [no catalogue number] (2014). Contains: Sonata in D major. Bibliography Philip J. Bone: The Guitar and Mandolin. Biographies of Celebrated Players and Composers for these Instruments (London: Schott & Co. and Augener Ltd., 1914; 2nd edition, 1954), p. 90–91. Fritz Stang: "Adam Darr. Gedanken zum 125. Todestag", in: Saitenspiel, January 1992, p. 11–14. English translation by Jane Curtis available here. Joseph Richard Costello: Adam Darr (1811-1866). The Career and Works of a German Romantic Guitarist and Zitherist (unpublished dissertation, Arizona State University, 2005). References External links Adam Darr Zither and Guitar Sheet music Category:1811 births Category:1866 deaths Category:19th-century classical
</passage>

Follow these steps to complete the task:

1. Inserting retrieval tokens:
   a. Read through the text carefully.
   b. Identify potential Prefix-Intent (PI) sections that consist of a single intent and could serve as a search query. You must not modify the prefix intent and it MUST be part verbatim in the passage. It cannot be single or only a few words.
   c. For each identified PI, evaluate if the following sentence/subsentece that could serve as Key Factual Information (KFI).
   d. Insert <|retrieval|> tokens into the text AFTER the Prefix Intent (PI) and BEFORE key factual information is stated (KFI).
   e. Key Factual information should not intersect with Prefix Intent.

2. Identifying Prefix-Intent (PI) and Key Factual Information (KFI):
   a. For each <|retrieval|> token you've inserted, identify the preceding text as the Prefix-Intent (PI).
   b. Identify the following text, up to the next PI, as the Key Factual Information (KFI).
   c. Ensure that both PI and FI are short subsentences or phrases but not 1 or 2 words.

3. Insert <|start-PI|>,<|end-PI|>, <|start-KFI|>, <|end-KFI|>.
   a. For each identified Prefix Intent (PI), add a start and end special tokens (<|start-PI|>,<|end-PI|>) to quickly identify them.
   b. Do the same for the Key Factual Information (KFI) (<|start-KFI|>, <|end-KFI|>)
   c. Ensure that the very first PI in the passage is preceded by <|start-PI|>.
   d. Double-check that every PI and KFI is properly enclosed in these tags.

4. Describing ideal retrieved information:
   a. Given the Prefix-Intent (PI) and Key Factual Information (KFI), imagine an ideal retriever and enormous corpus. 
   b. Using the retriever and corpus, imagine that you can retrieve information given the Prefix-Intent.  
   c. Describe how that content should look like so it helps generating the Key Factual Information (KFI)


5. Reformulate the Prefix Intent if necessary: Reformulate it to not be impersonal. This means that if the subject it is not identified (e.g. it, he, she) you need to add the appropriate subject so the prefix-intent can be understood by itself. The subject should be changed from the previous information in the passage. Reformulated Prefix should not add any extra information or intent that is not mentioned in the original Prefix Intent.


6. Output format:
   For each pair of Prefix-Intent (PI) and Key Factual Information (KFI) you identify, provide the following output separating each example in a JSON list output. Ensure that it is actually a JSON.

   - Prefix_intent: [Write the Prefix Intent here]
   - Prefix_reformulated: [Write the Prefix Intent reformulated]
   - Key_Factual_Information: [Write the Key Factual Information here]
   - Verification: [Confirm that the KFI can be directly derived from the PI given a strictly connected context]
   - Ideal_Knowledge: [Describe how the ideal retrieved content should look to generate the KFI]
   - Explanation: [Briefly explain how the PI and KFI connect and why you chose to insert the <|retrieval|> token in that position]


7. Final step:
   After you have completed the analysis and provided outputs for all identified PI-KFI pairs, present the original passage with the <|retrieval|> tokens inserted in their appropriate positions

Here's an example of the expected output format:

Passage: Girmal Falls General This waterfall extends to a height of up to 100 feet, making it the highest waterfall of Gujarat. The picturesque beauty of this site makes it popular among visitors and people of the region alike. The water swiftly falls from a great height, creating a fog like condition that’s eye catching. The government of this state is working on many projects to make this place an ideal picnic spot and a tourist attraction. The fall comes to its best form at the time of monsoon and provides an immensely striking appearance. Some of the best natural features of Gujarat can be explored in this place. This place is a nice and refreshing retreat for any traveler.

```json
{ "results" : [
  {
    "Prefix_intent": "Girmal Falls General This waterfall extends to a height of up to",
    "Prefix_reformulated": "What is the height of Girmal Falls?",
    "Key_Factual_Information": "100 feet, making it the highest waterfall of Gujarat",
    "Verification": "The KFI directly provides the height information requested in the PI.",
    "Ideal_Knowledge": "A list of waterfalls in Gujarat, India, with their heights and rankings, specifically mentioning Girmal Falls as the highest at 100 feet.",
    "Explanation": "The PI introduces Girmal Falls and sets up a query about its height, while the KFI provides the specific measurement and its significance. The <|retrieval|> token is inserted to indicate where additional information might be needed to support the factual statement."
  },
  {
    "Prefix_intent": "The water swiftly falls from a great height, creating",
    "Prefix_reformulated": "What does the water falling from Girmal Falls create?",
    "Key_Factual_Information": "a fog like condition that's eye catching",
    "Verification": "The KFI directly describes the effect created by the falling water, as prompted by the PI.",
    "Ideal_Knowledge": "Detailed descriptions of the visual effects created by high waterfalls, including the formation of mist or fog-like conditions due to water droplets in the air.",
    "Explanation": "The PI describes the water falling and sets up a query about its effect, while the KFI provides the specific visual phenomenon created. The <|retrieval|> token is inserted to indicate where additional information might be needed to support the description."
  },
  {
    "Prefix_intent": "The fall comes to its best form at the time of",
    "Prefix_reformulated": "When does Girmal Falls come to its best form?",
    "Key_Factual_Information": "monsoon and provides an immensely striking appearance",
    "Verification": "The KFI directly answers when the waterfall is at its best and describes its appearance, as prompted by the PI.",
    "Ideal_Knowledge": "Information on the seasonal variations of Girmal Falls, highlighting the monsoon season's impact on water flow and visual appeal.",
    "Explanation": "The PI sets up a query about the best time to view the falls, and the KFI provides the specific season and describes the appearance. The <|retrieval|> token is inserted to indicate where additional information about seasonal changes might be needed."
  }],
"Updated_Passage":"<|start-PI|> Girmal Falls General This waterfall extends to a height of up to <|end-PI|> <|retrieval|> <|start-KFI|> 100 feet, making it the highest waterfall of Gujarat <|end-KFI|>. The picturesque beauty of this site makes it popular among visitors and people of the region alike. <|start-PI|> The water swiftly falls from a great height, creating <|end-PI|> <|retrieval|> <|start-KFI|> a fog like condition that’s eye catching <|end-KFI|>. The government of this state is working on many projects to make this place an ideal picnic spot and a tourist attraction. <|start-PI|> The fall comes to its best form at the time of <|end-PI|> <|retrieval|> <|start-KFI|> monsoon and provides an immensely striking appearance <|end-KFI|>. Some of the best natural features of Gujarat can be explored in this place. This place is a nice and refreshing retreat for any traveler."
}

```
8. Final check:
  a. Review the Updated_Passage to ensure all PIs and KFIs are properly tagged.
  b. Verify that the first PI in the passage starts with <|start-PI|>.
  c. Make sure there are no missing or misplaced tags.
 
Remember to analyze the entire passage, identify all relevant PI-KFI pairs, and provide the output for each pair as specified. After completing the analysis, present the original passage with the <|retrieval|> tokens inserted in their appropriate positions as part of a new key in the JSON file. Only Ouput the JSON File.