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>
Udonids The Udonids (Udonen) were a German noble family, ruling as both the Counts of Stade and Margraves of the Nordmark, or Northern March, from the 9th to the 12th century. The first formal member of this family was Henry I the Bald, who took his seat in Harsefeld, part of the Duchy of Franconia, where he built a castle in 965. He was the grandson of the first Count of Stade, Lothar I, who was killed by the Great Heathen Army in the Battle of Ebstorf, and was recognized as one of the Martyrs of Ebsdorf by the Catholic Church. Henry’s grandson Lothair Udo I was Margrave of Nordmark in 1056. Because of the Slav uprising of 983, the Northern March in 1056 was limited to today’s Altmark, west of the Middle Elbe. After the Slavs were expelled and the march included the Lower Elbe, it was known as comitatus marchionis Udonis (the County of Margrave Udo). In the 1060s Emperor Henry IV looked to enlarge the empire’s boundaries and that included the County of Stade. The Udonen settled this in the emperor’s favor by agreeing to buy the county from the Archbishopric of Bremen, and ruled as vassals to the emperor as imperial princes. This continued until the deaths or deposition of brothers Udo IV, Rudolf II and Hartwig, which ended the male line of Udonids. Albert the Bear, Duke of Saxony, assumed power over the Margraviate of the Northern March while his successor ad duke, Henry the Lion, ruled the County of Stade from 1145 until forced out by Emperor Frederick Barbarossa. The County of Stade then came under the direct control of the Archbishops of Bremen, whereas Nordmark transitioned to the Margraviate of Brandenburg. The most reliable of the histories of the family is provided by Thietmar of Merseburg, son of Kunigunde von Stade, Henry’s daughter, and her husband Siegfried I the Older, Count of Walbeck. Thietmar had two great-grandfathers, Lothar I of Walbeck and Lothar II of Stade, who died in the Battle of Lenzen in 929. The earliest mention of the Udonoids is in the annotations of a commemorative edition of the Ragyndrudis Codex associated with Saint Boniface. The latter annotations of the codex recount a Count Henry of Kahle and his son Henry II the Good. The account mentions Henry’s second wife Hildegarde and their daughter Hildegarde who married into the Billung family, in particular Bernard I, Duke of Saxony. Thietmar claims that his grandfather Henry was related to Emperor Otto I, although this relationship has not been proven. The history of the family is clouded in the years after the death of Lothar at the Battle of Lenzen in 929, with the presence of Wichmann the Elder and his sons, but their criminal behavior soon resulted in the return of the Udonids. With the exception of the nondynastic Frederich, the family ruled the county and margraviate until the mid-12th century. Sources Krause, Karl Ernst Hermann, Lothar Udo II. und das Stader Grafenhaus. In: Allgemeine Deutsche Biographie. Band 19, Duncker & Humblot, Leipzig, 1884 Medieval Lands Project, Grafen von Stade (family of Lothar) Dehio, Georg, Hartwig I, Erzbischof von Bremen. In: Allgemeine Deutsche Biographie, Duncker & Humblot, Leipzig, 1879 Glaeske, Günter, Hartwig I. In: Neue Deutsche Biographie, Duncker & Humblot, Berlin, 1969 Schwarzwälder, Herbert, Die Bischöfe und Erzbischöfe von Bremen, Ihre Herkunft und Amtszeit - ihr Tod und ihre Gräber, in: Die Gräber im Bremer St. Petri Dom, Blätter der "Maus", Gesellschaft für Familienforschung, Bremen, 1996 Category:German noble families
</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.