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>
Lee Chun-soo Lee Chun-Soo (; born 9 July 1981) is a retired football player from South Korea. In 2002, he joined Ulsan Hyundai FC. He played as a forward for the national team during the 2002 World Cup, the 2004 Summer Olympics, and the 2006 World Cup. Football career While Lee attended Bupyeong High School, he was already being highly touted as the future of Korean football, along with Choi Tae-Uk. In 2002, Lee scored seven goals in the K-League and made the World Cup squad. After the World Cup, he moved to Real Sociedad of Spain, becoming the first Korean to play in the Spanish La Liga. After a mediocre season, however, he was loaned to fellow Spanish side Numancia, before returning to Ulsan Hyundai Horang-i of South Korea's K-League. Though Lee joined Ulsan mid-season, his performance proved to be invaluable to Ulsan's capture of the 2005 league, scoring a hat trick in the first leg of the finals. He was subsequently named the K-League's Most Valuable Player on 28 December 2005. At the 2006 World Cup, he scored Korea's first goal with a free kick against Togo in a 2–1 win. In the summer of 2008, Lee joined Feyenoord of the Netherlands but failed to adapt to the country. In July 2008 Feyenoord officially announced Lee's loan to Korean powerhouse Suwon Samsung Bluewings on a one-year deal. His stint was ill-received: he performed poorly, had clashes with the coaching staff, and was ultimately suspended from the K-League. After a few months, Suwon released him and on 26 February 2009, he was loaned to the Chunnam Dragons until 31 July 2009. On 13 June 2009, he signed with the Dragons. In the last week of June 2009, however, a secret contract was exposed. Feyenoord had also tried to transfer Lee to Al Nassr and Chunnam ultimately released him due to problems. He also left Saudi Arabia while still under contract with Al Nassr. He eventually joined Omiya Ardija of Japan. On 31 March 2013, he came back to the K-league after 1381 days with Incheon United in a game against Daejeon Citizen. After a slow start, he finally got an assist against Ulsan Hyundai on 20 April 2013. On 25 May 2013, he scored his first goal since his comeback against Busan IPark. While at the club, he took the role of veteran to lead the juniors and seniors as one team. On 5 November 2015, he announced his retirement as a player. His final performance came in March 2016 in an international fixture between Korea and Lebanon. Life after football In 2005, he took a special seminar at Goyang Baekyang Middle School with Chung Mong-joon, president of the Korea Football Association. In June 2014, he starred in the SNL Korea corner "GTA Soccer Game Winning Eleven" alongside Kim Min-kyo. In December 2015, he appeared on the show 'Masked Singer" and displayed his singing skills. As of March 2016, he is a commentator for JTBC3 Fox Sports. Club statistics Honours Club Ulsan Hyundai FC K League 1: 2005 A3 Champions Cup: 2006 Super Cup: 2006 League Cup: 2007 Feyenoord KNVB Cup : 2007–08 International South Korea FIFA World Cup fourth place: 2002 International goals Results list South Korea's goal tally first. References External links Lee Chun-soo – National Team Stats at KFA Category:1981 births Category:Living people Category:Ulsan Hyundai FC players Category:Real Sociedad footballers Category:CD Numancia players Category:Feyenoord players Category:Suwon Samsung Bluewings players Category:Jeonnam Dragons players Category:Al-Nassr FC players Category:Omiya Ardija players Category:Incheon United FC players Category:K League MVPs Category:K League 1 players Category:La Liga players Category:Eredivisie players Category:J1 League
</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.