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>
missions in the Vietnam War. In 1963, the Republic F-105 Thunderchief replaced the Super Sabres. Known Vietnam-era squadrons of the wing were: 12th Fighter-Bomber Squadron (Tail Code: ZA, ZZ) (September 1967 – June 1972) (F-105D/F) Det 1, 12th Tactical Fighter Squadron (Tail Code: ZB) (F-105F/G)(Deployed at Korat RTAFB, Thailand, September–November 1970. Redesignated as 6010 Wild Weasel Squadron and reassigned to 388th TFW) 44th Fighter-Bomber Squadron (Tail Code: ZL, ZZ) (March 1971 – December 1972) (F-4C) 67th Fighter-Bomber Squadron (Tail Code: ZG, ZZ) (March 1971 – October 1973) (F-4C) The deployments to Southeast Asia continued until the end of United States involvement in the conflict. An electronic warfare capability was added to the wing in late 1968 with the reassignment of the 19th Tactical Electronic Warfare Squadron from Shaw AFB, South Carolina flying the Douglas EB-66E Destroyer (Tail Code: ZT). The B-66s remained until 1970, flying daily over the skies of Southeast Asia. During the 1968 Pueblo crisis, the 18th deployed between January and June to Osan Air Base, South Korea following the North Korean seizure of the vessel. Frequent deployments to South Korea have been performed ever since to maintain the air defense alert mission there. The McDonnell Douglas F-4C/D Phantom II replaced the F-105s in 1971, and a further upgrade to the McDonnell Douglas F-15 Eagle was made in 1979. In May 1971, the 556th RS was also transferred from Yokota to Kadena with Martin EB-57E Canberra aircraft (Tail Code: GT) to the wing. It inactivated in 1973. In 1972, the 1st Special Operations Squadron was assigned, bringing their specialized C-130E-I. (Combat Talon) The RF-4C reconnaissance mission ended in 1989 with the transfer of the RF-4Cs to the 460th TRG at Taegu AB in Korea. Post Vietnam-era squadrons have been: 12th Tactical Fighter (June 1972 – May 1978, February 1981 – October 1991)F-4D (June 1972 – July 1979), F-15C/D (July 1979 – October 1991) (Tail Code: ZZ) 44th Tactical Fighter (December 1972 – May 1978, February 1981 – October 1991)F-4C (October 1973 – June 1975), F-4D (June 1975 – July 1979), F-15C/D (July 1979 – October 1991) (Tail Code: ZZ) 67th Tactical Fighter (October 1973 – May 1978, February 1981 – October 1991)F-4C (October 1973 – September 1980) (Tail Code: ZZ), F-15C/D (July 1979 – October 1991) (Tail Code: ZZ) Modern era The designation of the wing changed on 1 October 1991, to the 18th Wing with the implementation of the Objective Wing concept. The original designation, as determined by the then Wing Commander, Brigadier General Joseph Hurd, was 18 Wing; meant to mirror the numbering convention of the Royal Air Force. This was quickly changed however when it was disapproved by PACAF but there are coins, etc. from this time period that depict the wing's designation as 18 Wing. With the objective wing, the mission of the 18th expanded to the Composite Air Wing concept of multiple different wing missions with different aircraft. The mission of the 18th was expanded to include aerial refueling with Boeing KC-135R/T Stratotanker tanker aircraft (909th ARS); and surveillance, warning, command and control Boeing E-3B/C Sentry (961st AACS), and communications. Added airlift mission in June 1992 with the Beech C-12 Huron, transporting mission critical personnel, high-priority cargo and distinguished visitors. In February 1993, the 18th Wing gained responsibility for coordinating rescue operations in the Western Pacific and Indian Ocean with the addition of the 33d Rescue Squadron (33d RQS). In November 1999, the 18th Wing underwent another change as one of its three F-15 units, the 12th Fighter Squadron, was reassigned to the 3d Wing at Elmendorf Air Force Base, Alaska. In 2003
</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.