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>
Lu Huinan Lu Huinan (; 412 – February 24, 466), formally Empress Dowager Zhao (昭太后, literally "accomplished empress dowager"), semi-formally Empress Dowager Chongxian (崇憲太后), was an empress dowager of the Chinese dynasty Liu Song. She had been a concubine of Emperor Wen, and she became empress dowager because her son Liu Jun later became emperor (as Emperor Xiaowu). As imperial consort Lu Huinan came from a humble background, and her father appeared to have been a servant to the powerful Wang clan (descendants of the Jin prime minister Wang Dao). Her brother Lu Qingzhi (路慶之) definitely was a Wang clan servant. She grew up in the Jin and Liu Song capital Jiankang, and she was selected as an imperial consort for Emperor Wen, for her beauty. She had one son, Liu Jun the Prince of Wuling, but was not otherwise favored by Emperor Wen, and as Liu Jun grew and became rotated as a provincial governor throughout his father's reign, Consort Lu often accompanied Liu Jun to the provinces rather than stay in the palace. She also raised another son of Emperor Wen, Liu Yu the Prince of Xiangdong, whose mother Shen Rongji (沈容姬) had died early. After she had given birth to Liu Jun, she carried the rank of Shuyuan (淑媛), the fifth rank for imperial consorts. As empress dowager In 453, after Emperor Wen's oldest son Liu Shao the Crown Prince had assassinated Emperor Wen and taken the throne himself, Liu Jun rose against his brother from his defense post at Jiang Province (江州, modern Jiangxi and Fujian) and headed east to attack the capital Jiankang. Consort Lu remained at the capital of Jiang Province, Xunyang (尋陽, in modern Jiujiang, Jiangxi) and did not accompany her son on his campaign. Later in the year, after he had defeated and killed Liu Shao and taken the throne himself as Emperor Xiaowu, he had his brother Liu Hong (劉宏) the Prince of Jianping escort both her and his wife Princess Wang Xianyuan to Jiankang. Emperor Xiaowu honored his mother as empress dowager. Because Emperor Xiaowu often stayed in his mother's bedchambers, rumors grew that he was having an incestuous affair with his mother, but there was no conclusive evidence of such an affair. Empress Dowager Lu occasionally involved herself in her son's administration, and her nephews Lu Qiongzhi (路瓊之), Lu Xiuzhi (路休之), and Lu Maozhi (路茂之) became honored, although not particularly powerful, officials. On one occasion in 458, Lu Qiongzhi visited the noble Wang Sengda (王僧達), a descendant of Wang Dao, and he sat on Wang's bench—which Wang then ordered thrown out, because he felt dishonored that Lu Qiongzhi, a son of one of the Wangs' servants, would sit on his bench. Lu Qiongzhi informed Empress Dowager Lu of this and, angry that her family was being disrespected, she told her son to punish Wang. At this time, there was a rebellion led by Gao Du (高闍), and Emperor Xiaowu therefore falsely accused Wang of being Gao's supporter, and had him arrested and forced to commit suicide. There were only two additional historical references to Empress Dowager Lu during her son's reign. In 460, when her daughter-in-law Empress Wang presided over a ceremony where Empress Wang personally fed mulberry leaves to silkworms to show the imperial household's attention to farming, Empress Dowager Lu was present. In 461, when Emperor Xiaowu toured South Yu Province (南豫州), she accompanied him. As grand empress dowager and Empress Dowager Chongxian In 464, Emperor Xiaowu died and was succeeded by his son Liu Ziye, who took the throne as Emperor Qianfei. He honored his grandmother
</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.