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>
vocals (1988–1990), (1992), (1995), (2007–2010), (2013–present) Charlotte Kelly – lead vocals (1994–1997), (2008), (2010–2013), (2017–present) Touring and session musicians Ellen Blair – violin (1988–present) Gill Morley – violin (1988–present) Gota Yashiki – programming (1988) Nellee Hooper – producer, programming (1988–1997) Simon Law – producer, programming (1988–1997) Emma "S.E.L." Louise – backing vocals (2007–2017) Samantha Pennells – backing vocals (2007–2017) Jody Findley – backing vocals (2007–2017) MC Chickaboo – turntables (DJ), rapper (2007–2018) Nadine Caesar – backing vocals, co–lead vocals (2018–present) Nikisha Reyes – backing vocals (2018–present) Tanya Edwards – backing vocals (2018–present) Former members Doreen Waddell – co–lead vocals (1988) Rose Windross – co–lead vocals (1988), (2010–2011) Jazzi Q – turntables (DJ) (1988–1990), (2012) Aitch Bee – turntables (DJ) (1988–1995), (2007), (2012) Nellee Hooper – producer (1988–1992) Daddae – co–lead vocals, turntables (DJ), rapper, producer, (1988–1995) Marcia Lewis – lead vocals (1989–1990) Lamya Al-Mugheiry – co–lead vocals (1990) Victoria Wilson-James – co–lead vocals (1990) Kym Mazelle – co–lead vocals (1990), (2010–2011) Penny Ford – lead vocals (1992–1995) Melissa Bell – co–lead vocals (1993–1995) Discography Club Classics Vol. One (1989) Vol. II: 1990 – A New Decade (1990) Volume III: Just Right (1992) Volume V: Believe (1995) Time for Change (1997) Awards and nominations American Music Awards |- |rowspan="5"| |"Keep on Movin'" |Favorite Soul/R&B Single | |- |rowspan="3"|Soul II Soul |Favorite Soul/R&B Band/Duo/Group | |- |Favorite Soul/R&B New Artist | |- |Favorite Dance New Artist | |- |"Back to Life (However Do You Want Me)" |Favorite Dance Single | |- BRIT Awards |- |rowspan="4"|1990 |Club Classics Vol. One |Best British Album | |- |"Back to Life (However Do You Want Me)" |Best British Single | |- |rowspan="3"|Soul II Soul |Best British Newcomer | |- |Best British Group | |- |rowspan="1"|1991 |Best British Group | Grammy Awards |- |rowspan="3"| |Soul II Soul |Best New Artist | |- |rowspan="1"|"Back to Life (However Do You Want Me)" |Best R&B Performance by a Duo or Group with Vocal | |- |rowspan="1"|"African Dance" |Best R&B Instrumental Performance | |- |rowspan="1"| |rowspan="1"|"Mood" |Best R&B Instrumental Performance | Juno Awards |- |rowspan="1"| 1991 |"Back to Life (However Do You Want Me)" |Best International Single of the Year | Soul Train Music Awards |- | rowspan="4"| 1990 | rowspan="1"| Keep on Movin' | Best R&B/Urban Contemporary Album, Group, Band, or Duo | |- | rowspan="2"| "Keep on Movin'" | Best R&B/Urban Contemporary Song of the Year | |- | Best R&B/Urban Contemporary Single, Group, Band, or Duo | |- | rowspan="1"| Soul II Soul | Best R&B/Urban Contemporary New Artist | |- See also List of number-one dance hits (United States) List of artists who reached number one on the US Dance chart References External links Category:English dance music groups Category:English hip hop groups Category:British contemporary R&B musical groups Category:British soul musical groups Category:Grammy Award winners Category:English pop music groups Category:Virgin Records artists Category:Black British musical groups Category:Musical groups from London Category:Musical groups established in 1988 Category:Musical groups disestablished in 1998 Category:Musical groups reestablished in 2007
</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.