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>
Wilhelm von Gloeden Wilhelm Iwan Friederich August Freiherr von Gloeden (September 16, 1856 – February 16, 1931) was a German photographer who worked mainly in Italy. He is mostly known for his pastoral nude studies of Sicilian boys, which usually featured props such as wreaths or amphoras suggesting a setting in the Greece or Italy of antiquity. From a modern standpoint, his work is commendable due to his controlled use of lighting as well as the often elegant poses of his models. His innovations include the use of photographic filters and special body makeup (a mixture of milk, olive oil, and glycerin) to disguise skin blemishes. Early life Wilhelm von Gloeden's background is something of a mystery. Although Gloeden alleged he was a minor German aristocrat from Mecklenburg, the heirs of the baronial branch of the Gloeden family have always insisted that no such person existed in their family records and that his claim to a barony was without warrant; the barony became extinct in 1885 with the death of Baron Falko von Gloeden. It is believed he was the son of head forester Carl Hermann Gloeden (1820–1862) and his wife Charlotte Maassen (1824–1901; from 1864 Charlotte von Hammerstein). After studying art history in Rostock (1876), Gloeden studied painting under at the Weimar Saxon-Grand Ducal Art School (1876–77) until he was forced by lung disease (apparently tuberculosis) to interrupt his studies for a year, convalescing at a sanatorium in the Baltic Sea resort of Görbersdorf, now known as Sokołowsko. Taormina In a search for health, he travelled to Italy (1877–78), first staying in Naples before moving on to Taormina in Sicily. He lodged at the Hotel Vittoria before buying a house near San Domenico Convent. Apart from the period 1915-18, during the First World War, when he was forced to leave Sicily to avoid internment as an enemy alien, he remained in Taormina until his death in 1931. The mayor of the town in 1872-82 was the German landscape painter (1843–1939), who had moved there in 1863. Through him, Gloeden became acquainted with the local inhabitants. He set up his photographic studio at first as a hobby and was exhibiting his work internationally by 1893 (London), including Cairo (1897), Berlin (1898–99, including a solo exhibition), Philadelphia (1902), Budapest & Marseilles (1903), Nice (1903 & 1905), Riga (1905), Dresden (1909) and Rome (World Fair 1911). His well-known study of two young boys clinging to an Ionic column was published in The Studio (London) in June 1893 (above a nude study by Baron Corvo of Cecil Castle, cousin of Charles Kains Jackson), which brought his work to the notice of a wider public. In 1895, when his family's fortune was lost through the "Hammerstein affair", Gloeden received as a gift from his friend and patron the Grand Duke of Mecklenburg-Schwerin, a large-format plate camera. Soon his work brought him visitors from Europe, including royalty, industrialists, writers, including Oscar Wilde in December 1897, and artists. In 1930, Gloeden ceased work as a photographer and sold his house on the Piazza San Domenico in Taormina in return for an annuity and residence rights. Gloeden scrupulously shared the proceeds of his sales with his models. The names of some of the models are known: Pasquale Stracuzzi (known as "Pasqualino"); Vincenzo Lupicino (known as "Virgilio" & seen in the "Boy with Flying Fish" photographs); Peppino Caifasso or Carafasso (who posed as "Ahmed"); Pietro Caspano or Capanu; Nicola Scilio, also spelt Sciglio; Giuseppe De Cristoforo; and Maria Intelisano (niece of the parish priest of nearby Castelmola). His cousin, Guglielmo Plüschow (1852–1930), also a photographer of nudes, helped
</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.