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>
Canton of Zürich The canton of Zürich ( ) is a Swiss canton in the northeastern part of the country. With a population of (as of ), it is the most populated canton in the country. Its capital is the city of Zürich. The official language is German. The local Swiss German dialect, called Züritüütsch, is commonly spoken. In English the name of the canton and its capital is often written without an umlaut. History Early history The prehistoric pile dwellings around Zürichsee comprise 11 of total 56 prehistoric pile dwellings around the Alps in Switzerland, that are located around Lake Zürich in the cantons of Schwyz, St. Gallen and Zürich. Located on the shore of Lake Zürich, there are Freienbach–Hurden Rosshorn, Freienbach–Hurden Seefeld, Rapperswil-Jona/Hombrechtikon–Feldbach, Rapperswil-Jona–Technikum, Erlenbach–Winkel, Meilen–Rorenhaab, Wädenswil–Vorder Au, Zürich–Enge Alpenquai, Grosser Hafner and Kleiner Hafner. Because the lake has grown in size over time, the original piles are now around to under the water level of . Also on the small area of about around Zürichsee, there also the settlements Greifensee–Storen/Wildsberg on Greifensee and Wetzikon–Robenhausen on Pfäffikersee lakeshore. As well as being part of the 56 Swiss sites of the UNESCO World Heritage Site, each of these 11 prehistoric pile dwellings is also listed as a Class object in the Swiss inventory of cultural property of national and regional significance. Zurihgauuia (Zürichgau) was a subdivision of Turgowe (Thurgau) in the Duchy of Alamannia, consisting roughly of the territory between Reuss and Töss. From the 740s, substantial portions of Zürichgau were owned by the Abbey of St. Gall. In c. 760, an administrative re-organisation under counts Ruthard and Warin exempted the castle town of Zürich from comital rule. A county of Zürichgau was established under Louis the Pious, for a count Ruadker, in 820. Zürichgau (Zurichgeuue) remained a nominally separate territory in the later 9th century but was often ruled by the same count as Thurgau. In 915, Zürichgau together with Thurgau fell to the Bucharding dukes of Swabia. In the late 10th century, the county of Zürich was ruled by the Nellenburger, and during 1077–1172 by the Lenzburger. By the 13th century, Zürichgau was divided between the Habsburgs and the Kyburger, who held the territory west and east of Lake Zürich, respectively. City state The territory of the canton of Zürich corresponds to the lands acquired by the city of Zürich after it became reichsfrei in 1218. Zürich pursued a policy of aggressive territorial expansion especially during the century following the revolution of the guilds in 1336. Zürich joined the Swiss Confederacy in 1351. Zürich claimed and lost the Toggenburg in the Old Zürich War of the 1440s. The northern parts up to the river Rhine came to the canton after the city of Zürich purchased Winterthur from the Habsburgs in 1468. In 1651, Zürich purchased Rafzerfeld from the counts of Sulz. At this point, almost all of the territory of the modern canton (as well as some territories beyond its modern borders) was owned by Zürich; exceptions include Wülflingen (acquired 1760), Buch (acquired 1761), Dietikon, which was a condominium, and Rheinau (owned by Rheinau Abbey). In the 18th century, the "inner bailiwicks" (Innere Vogteien) were under direct administration of city officials, while the "outer bailiwicks" (Äussere Vogteien) were ruled by the reeves of Kyburg, Grüningen, Greifensee, Eglisau, Regensberg, Andelfingen, Wädenswil, and Knonau. The city of Winterthur was nominally subject to Zürich but retained far-reaching autonomy. Zürichgau, the name of the medieval pagus, was in use for the territories of the city of Zürich during the 15th and 16th century; the term canton (Kanton) gradually entered use in
</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.