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>
be flown to Okinawa. The police then board the plane and arrest him. July 31 – Far Eastern Air Transport Flight 134, a Vickers 837 Viscount (registration B-2029), stalls and crashes on the runway while landing in a heavy rainstorm at Taipei Songshan Airport in Taipei, Taiwan, killing 27 of the 75 people on board. August August 3 A Royal Jordanian Airlines Boeing 707-321B chartered by Royal Air Maroc strikes a mountainside in the Atlas Mountains near Agadir, Morocco, while on approach to Inezgane Airport, killing all 188 people on board. It remains the deadliest accident in history involving a Boeing 707. Flying from Veracruz, Mexico, to San Salvador, El Salvador, a Nicaraguan Air Force Douglas C-47 Skytrain is forced to divert due to bad weather at San Salvador. Before it can land at another airport, it runs out of fuel and crashes into the Pacific Ocean off Punta Amapala, El Salvador, killing all 21 people on board. It is the deadliest aviation accident in the history of El Salvador at the time. August 9 Japan Air Lines establishes Japan Asia Airways as a subsidiary. On approach in clouds to Bagdarin Airport in Bagdarin in the Soviet Union's Russian Soviet Federated Socialist Republic, an Aeroflot Ilyushin Il-14M (registration CCCP-52056) strays off course and crashes into a wooded hillside 28 kilometers (17.5 miles) from the airport, killing all 11 people on board. August 15 – An Aeroflot Yakovlev Yak-40 (registration CCCP-87323) encounters a strong downdraft at an altitude of 300 meters (984 feet) during a night approach to Krasnovodsk Airport in Krasnovodsk in the Soviet Union's Turkmen Soviet Socialist Republic. The airliner almost stalls and banks heavily before its fuselage strikes cliffs along the Caspian Sea coast 4.7 kilometers (2.9 miles) short of the runway. Its right wing and engine separate, it bounces off the cliff, and then it crashes into another cliff and catches fire. The crash kills 23 of the 28 people on board. It is the worst aviation accident in the history of Turkmenistan. August 20 – ČSA Flight 540, an Ilyushin Il-62, en route from Prague to Tehran via Damascus and Baghdad crashes into a sand dune while on approach to Damascus International Airport, Syria, killing 126 of the 128 people on board. It remains the deadliest accident in the history of ČSA. August 30 – Wien Air Alaska Flight 99, a Fairchild F-27B, crashes into Sevuokuk Mountain while on approach to Gambell, Alaska, in fog, killing 10 of the 32 people on board and injuring all 22 survivors. September September 1 – Too low on approach to Leipzig/Halle Airport in Schkeuditz, East Germany, an Interflug Tupolev Tu-134 (registration DM-SCD) strikes a radio mast at an altitude of 2 to 3 meters (6.5 to 10 feet), damaging its left wing and causing its left engine to detach. It crashes short of the runway, killing 27 of the 34 people on board. September 2 The unified Canadian Armed Forces merges its aviation services into a single command, the Canadian Forces Air Command. New all-year Svalbard Airport, Longyear, opens on permafrost at Hotellneset, operated by Avinor. It is the world's northernmost airport with public scheduled flights. September 3 – Retired American professional baseball player Irv Medlinger is one of two people killed aboard a Piper PA-24 Comanche destroyed while attempting a crash-landing near Wheeling, Illinois, after its engine fails. September 9 – Three hijackers commandeer a Haiti Inter Air de Havilland Canada DHC-6 Twin Otter during a domestic flight in Haiti from Port-au-Prince to Cap Haitien, demanding to be flown to Cuba. The airliner diverts to Gonaives, Haiti, where
</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.