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>
war, post war expulsions and the Forced labor of Germans in the Soviet Union, broken out as follows: Germany in 1937 borders :File:Oder-neisse.gif 1,339,000; Poland in 1939 borders 185,000; Danzig 83,000; Czechoslovakia 273,000; Yugoslavia 136,000; Romania 101,000; Hungary 57,000; Baltic States 51,000. (1965), The search service of the German churches and Red Cross was able to confirm 473,013 civilian deaths in eastern Europe due to the expulsions, broken out as follows: 367,392 Poland(in post war borders); 18,889 Sudetenland; 64,779 Slovakia, Hungary, Romania and Yugoslavia; 9,064 Baltic States ; and 12,889 Germans resettled in Poland. There were an additional 1,905,991 unsolved cases of persons reported missing. The results of this survey were kept secret until 1987. (1966) The West German Federal Ministry for Expellees, Refugees and War Victims issued a statement that put the number of expulsion dead at 2,111,000 (1,225,000 Germany in 1937 borders :File:Oder-neisse.gif and 886,000 foreign nationals of German ancestry in eastern Europe) (1974) A study by the German Federal Archive estimated a death toll of 600,000 of civilians in the expulsions and deportations to the USSR. (400,000 in Poland (in post war borders) and the Kaliningrad Oblast of Russia; 130,000 in Czechoslovakia and 80,000 in Yugoslavia.) The authors of the report maintain that these figures cover only those deaths caused violent acts and deaths in forced labor and internment camps. They also stated that their figures do not include deaths due to malnutrition and disease. This report was kept secret and not published until 1989. (1985) A demographic analysis which has the support of the German government, estimated 2,020,000 civilians died during the post war expulsions and the forced labor of Germans in the Soviet Union broken out as follows: (870,000Germany in 1937 borders east of the Oder–Neisse line; 108,000 Germans resettled in Poland during the war; 174,000 Poland in 1939 borders ; 40,000 Danzig; 220,000 Czechoslovakia; 106,000 Yugoslavia; 75,000 Romania; 84,000 Hungary; 33,000 Baltic States; 310,000 USSR) The German government currently maintains that 2.0 million civilians perished in the flight and expulsion from Eastern Europe. In 2006, Christoph Bergner, Secretary of State in Germany's Bureau for Inner Affairs maintainted that the figure of 2 million deaths is correct because it includes the deaths from malnutrition and disease of those civilians subject to the expulsions. A 2005 report by the German government search service put the death toll at 2,251,500, they did not provide details of the figure The current position in 2015 of the German government Federal Agency for Civic Education is that 2 million civilians perished in the expulsions, they cited as the source for this figure Gerhard Reichling, Die deutschen Vertriebenen in Zahlen. German government figures of 2.0 to 2.5 million civilian deaths due to expulsions have been disputed by scholars since the publication of the results of the German church search service survey and the report by the German Federal Archive. German historian Rüdiger Overmans (2000) published a study of German military casualties, this project did not investigate civilian expulsion deaths. Overmans did however provide a critical analysis of the previous studies by German government of the human losses in the expulsions. Overmans maintains that these studies lack adequate support, he maintains that a figure of 500,000 expulsion dead is credible and that there are more arguments for the lower figures rather than the higher figures, he believes that new research is needed to determine the correct balance of the human losses in the expulsions. According to Overmans the figure of 1.9 million missing persons reported by the search service is unreliable as it includes military dead and persons of dubious German ancestry
</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.