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>
Tiffany Butcher Tiffany Butcher-Baker (also Dean and Butcher) is a fictional character from the BBC soap opera EastEnders, played by Maisie Smith. Tiffany is the daughter of established characters Bianca Jackson (Patsy Palmer) and Ricky Butcher (Sid Owen), though originally she was believed to be Bianca's daughter with a man named Nathan Dean. Tiffany's surname was changed in the show's credits from Dean to Butcher, which has also been referenced in the show. Tiffany departed, alongside her half-brother Morgan Butcher (Devon Higgs) and their mother Bianca, in September 2014. Tiffany made an unannounced return on 3 November 2016 when she and Morgan returned for Whitney Dean (Shona McGarty) and Lee Carter's (Danny-Boy Hatchard) wedding. On 23 November 2017, it was announced that executive consultant John Yorke was to reintroduce the character, with Smith reprising her role as Tiffany full-time. She returned on 8 January 2018. Her storylines since her return have included her friendship with Bernadette Taylor (Clair Norris), becoming a drug dealer, being groomed by Evie Steele (Sophia Capasso), subsequently being raped and a relationship and later marriage with Keegan Baker (Zack Morris). Storylines Backstory Tiffany is the product of a one-night stand between Ricky Butcher (Sid Owen) and Bianca Jackson (Patsy Palmer), which was shown on their spin-off show Ricky & Bianca, set in Manchester in 2002. Shortly after leaving their son Liam (James Forde) with Ricky, Bianca began a relationship with a trucker named Nathan Dean, before discovering she was pregnant. Nathan died in a road accident when Bianca was heavily pregnant and she took on the responsibility of Nathan's daughter, Whitney Dean (Shona McGarty). She gave birth to Tiffany, whom she named after her deceased best friend Tiffany Mitchell (Martine McCutcheon), and raised her as Nathan's daughter and Whitney's half-sister, although she still remained uncertain about Tiffany's true paternity. Tiffany grew up believing Nathan was her father. 2008–2016 Tiffany, her mother and siblings Whitney, Liam and Morgan Jackson-King (Devon Higgs) are evicted by their landlord. After the family sleep at a bus shelter and Bianca assaults a police officer, Tiffany and her siblings spend a week in care, but the family later move to Walford, where they move in with her great-grandmother Pat Evans (Pam St Clement). Tiffany causes havoc by stealing a top from Stacey Slater's (Lacey Turner) stall for Whitney to wear for a family party and defacing the pavement outside Zainab Masood's (Nina Wadia) house before ruining her primroses by pouring soapy water over them. As a result, Tiffany unwittingly instigates feuds between her mother, Stacey and Zainab. However, she takes to her mother's cousins Bradley Branning (Charlie Clements) and Abi Branning (Lorna Fitzgerald), sharing a common interest in animals. Tiffany's love of animals leads to Whitney begging Vinnie Monks (Bobby Davro) to give them Wellard, formerly the Jackson family dog that had been sold to Vinnie after his previous owner Gus Smith (Mohammed George) left Walford. Vinnie gives Tiffany Wellard on the condition that Whitney and Liam wash his car every day until he says otherwise. However, tragedy strikes when Wellard has to be euthanised. Tiffany is devastated, and after overhearing a phone conversation, she is convinced that her great-uncle Ian Beale (Adam Woodyatt) is behind Wellard's demise. However a post-mortem leads to the discovery that Bianca was responsible for Wellard's death because she gave him chocolate. Tiffany eventually forgives her mother after Bianca convinces Pat to give them her dog Terrence. However, Tiffany is once again left devastated when her aunt Janine Butcher (Charlie Brooks) spitefully reclaims Terrence, who was originally her dog. Tiffany takes to her mother's ex-husband Ricky, who
</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.