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>
6 months he will concentrate solely on finding the right school for his son. Tse-keung and Marius first meet when the two fight for the same robotic toy for their sons. The two meet again when Marius joins Ophelia's learning center as a part-time tutor in order to help his son. Cast Ku family Johnson Lee as Ku Tse-keung (谷自強) Ku Tui-nam's father and Bella Fung Yuet-na's ex-husband. He is a real-estate agent and is the top salesman at his branch because he is very dedicated to his work and he uses underhanded tactics to steal accounts from other salesmen at his branch. He looks after his son for an extended period of time when his ex-wife gets remarried. Due to doctoring a lease agreement without the homeowners consent, his real-estate license is suspended for six month. Unable to find work he decides to invest in Ophelia's struggling learning center. Marcus Lo as Ku Tui-nam (谷莜楠) Ku Tse-keung and Bella Fung Yuet-na's young son. He is left in extended care of his father when his mother marries her new husband, Pacino. Living with his father, he has to learn to fend for himself since his father is not used to caring for him and does not understand his needs. Li Shing-cheong as Ku Seun-chiu (谷順潮) Ku Tse-keung's father. Ku Tui-nam's grandfather. Chan May-lin's husband. Deborah Poon as Chan May-lin (陳美蓮) Ku Seun-chiu's much younger second wife. Ku Tse-keung's step-mother. Chu family Alice Chan as Judy Chu Lei-san (諸麗仙) Ophelia Chu Lei-fa's older sister. She is the CEO of their learning centers and goes from city to city to opening new learning centers without realizing their business is struggling. Mandy Wong as Ophelia Chu Lei-fa (諸麗花) Judy Chu Lei-san's younger sister. She manages her older sister's Hong Kong learning center. She meets Ku Tse-keung when he is the real-estate agent that shows her an apartment for rent. Integrity is very important to her and she shows Tse-keung how to be a better person when he is in the presence of his son, Tui-nam. Seung family Pat Poon as Seung Sun (常新) Marius's father. Carrie Ho Lok-ti's father in-law. Seung Yee's and Yi's grandfather. He is a retired Chinese Medical physician. Academics is very important to him. Wanting his grandson Yi to get into a good elementary school he gets a job at that school in hope that his connections will get his grandson in. Jason Chan Chi-san as Marius Seung Nim-shu (常念書) Seung Sun's son. Carrie Ho Lok-ti's husband. Seung Yee's and Yi's father. He is a successful architect. His career takes him away from his family for extended periods making him often miss out on important events in his children's life. Worried about his son, Yi, he quits his job to concentrate on making sure his son gets into a good school. Candice Chiu as Carrie Ho Lok-ti (何樂姿) Marius's wife. Seung Yee's and Yi's mother. Seung Sun's daughter in-law. She is a former Physical Therapist who gave up her career in order to care for her children and look after the home due to her husband's demanding job. Bianca Chan as Seung Yee (常逸) Marius's and Carrie's first born child. Seung Sun's granddaughter. Yi's older sister. She is academically smart and receives praises from her grandfather. Her family nicknames her Ah Yut (which means "one" in Cantonese). Chan Pak-hei as Seung Yi (常懿) Marius's and Carrie's younger child. Seung Sun's grandson. Yee's little brother. He is shy and an introvert. He is not as academically smart and is often compared to his sister. His family nicknames him Ah Ye
</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.