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>
Faith's estranged mother. Austin "Dinky" Byne — Mrs. Robilotti's nephew. Edwin Laidlaw — A publisher who is terrified that his prior relationship with Miss Usher will be exposed by the investigation into her death. Cecil and Celia Grantham — Mrs. Robilotti's twin son and daughter from her first marriage. Paul Schuster and Beverly Kent — Along with Edwin Laidlaw and Archie Goodwin, dinner partners for the young women at the party. Inspector Cramer and Sergeant Purley Stebbins—Manhattan Homicide Saul Panzer, Fred Durkin, and Orrie Cather—Wolfe's preferred free-lance detectives Reviews and commentary Jacques Barzun and Wendell Hertig Taylor, A Catalogue of Crime — Archie and Nero shine, once again, on the question: Who slipped the cyanide into the glass of the girl attending the unwed mothers' annual party at the house of their benefactress? Two small queries: would the dead philanthropist write the odd letter of gift that provides no better control of large funds than someone's probity? And how was the poison actually administered? One can't buy ready-mixed KCN. Nancy Pearl, Book Lust — When Stout is on top of his game, which is most of the time, his diabolically clever plotting and his storytelling ability exceed that of any other mystery writer you can name, including Agatha Christie, who invented her own eccentric genius detective Hercule Poirot. Although in the years since Stout's death I find myself going back and rereading his entire oeuvre every year or two, I return with particular pleasure to these five novels: The Doorbell Rang; Plot It Yourself; Murder by the Book; Champagne for One; and Gambit. Adaptations A Nero Wolfe Mystery (A&E Network) Lee Goldberg and William Rabkin adapted Champagne for One for the second episode of the A&E TV series A Nero Wolfe Mystery (2001–2002), a Jaffe/Braunstein Films coproduction with the A&E Network. The second of four Nero Wolfe episodes directed by executive producer and star Timothy Hutton, "Champagne for One" made its debut in two one-hour episodes airing April 29 and May 6, 2001, on A&E. Timothy Hutton is Archie Goodwin; Maury Chaykin is Nero Wolfe. Other members of the cast (in credits order) are Bill Smitrovich (Inspector Cramer), Colin Fox (Fritz Brenner), James Tolkan (Mr. Hackett). Marian Seldes (Louise Grantham Robilotti), Kari Matchett (Celia Grantham), Conrad Dunn (Saul Panzer), Nicky Guadagni (Elaine Usher), Kathryn Zenna (Helen Yarmis), Alex Poch-Goldin (Edwin Laidlaw), Robert Bockstael (Paul Schuster), R.D. Reid (Sergeant Purley Stebbins), Christine Brubaker (Rose Tuttle), Steve Cumyn (Cecil Grantham), Boyd Banks (Austin "Dinky" Byne), David Schurmann (Robert Robilotti), Michael Rhoades (Beverly Kent), Janine Theriault (Ethel Varr) and Patricia Zentilli (Faith Usher). The episode's signature waltz is Jazz Suite No. 2 (Suite for Promenade Orchestra), VI — Waltz 2, by Dmitri Shostakovich, recorded by the Royal Concertgebouw Orchestra conducted by Riccardo Chailly. The soundtrack also includes music by Luigi Boccherini, Rick Krive and Antonio Vivaldi. In North America, A Nero Wolfe Mystery is available on Region 1 DVD from A&E Home Video (). "Champagne for One" is divided into two parts as originally broadcast on A&E. "Champagne for One" is one of the Nero Wolfe episodes released on Region 4 DVD in Australia under license by FremantleMedia Enterprises. Nero Wolfe — Collection One (2008) presents "Champagne for One" as a 90-minute film with a single set of titles and credits. In 2009 the film was released on Region 2 DVD in the Netherlands, by Just Entertainment. All three DVD releases present "Champagne for One" in 4:3 pan and scan rather than its 16:9 aspect ratio for widescreen viewing. Nero Wolfe (Radiotelevisione italiana S.p.A.) Grazia Giardiello adapted Champagne for One for the second
</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.