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>
The Vampire Diaries (season 4) The Vampire Diaries, a one-hour American supernatural drama, was renewed for a fourth season by the U.S. channel The CW on May 3, 2012, seven days before the third season's finale. Unlike the previous seasons that aired in September, it premiered on October 11, 2012, to avoid competition from major television shows. Season 4 consisted of 23 episodes instead of the usual 22 episodes. On January 11, 2013, it was announced that a back-door pilot focused on the Originals, titled The Originals will air on April 25 for series pick-up. On April 26, 2013, The CW announced that The Originals, The Vampire Diaries spin-off series, was picked up for a full season slated to premiere next fall. On February 11, 2013, The CW renewed the series for a fifth season. Cast Main Nina Dobrev as Elena Gilbert / Katherine Pierce Paul Wesley as Stefan Salvatore / Silas Ian Somerhalder as Damon Salvatore Steven R. McQueen as Jeremy Gilbert Kat Graham as Bonnie Bennett Zach Roerig as Matt Donovan Candice Accola as Caroline Forbes Michael Trevino as Tyler Lockwood Joseph Morgan as Klaus Mikaelson Recurring Claire Holt as Rebekah Mikaelson David Alpay as Atticus Shane Grace Phipps as April Young Phoebe Tonkin as Hayley Marshall Marguerite MacIntyre as Liz Forbes Todd Williams as Connor Jordan Rick Worthy as Rudy Hopkins Nathaniel Buzolic as Kol Mikaelson Charlie Bewley as Galen Vaughn Susan Walters as Carol Lockwood Arielle Kebbel as Lexi Branson Daniel Gillies as Elijah Mikaelson Special guest Jasmine Guy as Sheila Bennett Guest Alyssa Diaz as Kim Matt Davis as Alaric Saltzman Torrey DeVitto as Meredith Fell Paul Telfer as Alexander Scott Parks as Silas Michael Reilly Burke as Pastor Young Camille Guaty as Caitlin Shane Cynthia Addai-Robinson as Aja Blake Hood as Dean Ser'Darius Blain as Chris Madeline Zima as Charlotte Adina Porter as Nandi LaMarche Persia White as Abby Bennett Wilson Charles Michael Davis as Marcel Gerard Daniella Pineda as Sophie Deveraux Leah Pipes as Camille O'Connell Callard Harris as Thierry Vanchure Eka Darville as Diego Malaya Rivera Drew as Jane-Anne Deveraux Lex Shontz Episodes Production On May 3, 2012 The CW renewed The Vampire Diaries for a fourth season. Unlike previous seasons, it started on October 11. Kevin Williamson, Julie Plec, Leslie Morgenstein and Bob Levy are executive producers for the series. The season was concluded on May 16, 2013. Casting The series stars Nina Dobrev who plays Elena Gilbert and Katherine Pierce, Paul Wesley as Stefan Salvatore, Ian Somerhalder as Damon Salvatore, Steven R. McQueen as Jeremy Gilbert, Kat Graham as Bonnie Bennett, Candice Accola as Caroline Forbes, Zach Roerig as Matt Donovan, Michael Trevino as Tyler Lockwood, Joseph Morgan as Klaus Mikaelson and Claire Holt as Rebekah Mikaelson. On August 7, 2012 it was announced that Phoebe Tonkin and Todd Williams will join the show as recurring characters in the fourth season. Phoebe Tonkin will portray Hayley, a friend of Tyler's. Todd Williams will portray Connor, a vampire hunter. The Olympic gymnast Gabby Douglas made an appearance in "My Brother's Keeper" as a volunteer decorator for the Miss Mystic Falls Beauty Pageant. On the CW website, an interview with Douglas shares her experience on set and with the cast. Starting with episode 13, Charlie Bewley will join the show as Vaughn, like Connor a vampire hunter, and Camille Guaty as Professor Shane's dead wife Caitlin, who is going to reveal information about him. On February 2013, it was announced that Daniella Pineda was cast as the witch Sophie for episode 20 "The Originals". This episode serves as a backdoor-pilot for a
</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.