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>
Samsung Sens Samsung Sens (branded as Samsung Electronics Notebook System, and stylized as SENS) is the notebook computer series made by Samsung Electronics. Samsung notebooks are designed similarly to the Acer Aspire, Asus Transformer and Zenbook, Dell Inspiron, HP Pavilion and Envy series, Lenovo IdeaPad and Toshiba Satellite. While they were available in many countries, the Sens notebook line were for some years now sold in the United States and Canada. However, in mid-October 2008, Samsung announced that it would be re-launching its Sens notebooks on the US market. Series There are 15 series of Sens laptops and 2-in-1s: E, M, N, Notebook 7, Notebook 9, P, Q, QX, R, RC, RF, RV, SF, X and G. E Series E3520 M Series M- This series includes laptop computers with large screens (17"~19") and faster processors (Core 2 Duo), graphic cards, etc. For example: M50, M55, M70. N Series N- This is Samsung's newly launched netbook line-up, with the emphasis on keeping size, weight and cost to a minimum. The first N-series model worldwide is the Sens NC10. They continue their N line with NF line. Notebook 7 Series Notebook 7- The Samsung Notebook 7 spin (13-inch) and Samsung Notebook 7 spin (15-inch) are 2-in-1 notebooks with a 13-inch and 15-inch touchscreen and Intel Core i5 and i7 processors and graphic cards, etc. Notebook 9 Series Notebook 9- The Samsung Notebook 9 spin is a 2-in-1 notebook with a 13-inch touchscreen and Intel Core i7 processor. P Series P- This Sens was a mainstream notebook - a kind that is noted with the characteristics of being fair in price, heavy, short in battery life, and thick. But now, it is in the process of being discontinued in many countries. Q Series Q- This series is an ultraportable, or at least they are quite light laptops. It has the characteristics of portable laptops: long battery life, small screen size, rather thin and light. Q series includes Q30(Also Sold as Dell Latitude X1), Q40(Core Solo), Q35(Core 2 Duo or Celeron M), and UMPCs, Q1 and Q1 Ultra. Recently, the 13.3" screen Q70 was released bringing a new maximum screen size into the Q range. Both the Q70 and 12.1" Q45 introduce the Santa Rosa platform in Samsung notebooks. They continue their Q line with QX line. Q330 Q430 Q530 QX Series QX310 QX311 QX410 QX411 QX412 QX510 QX511 R Series R- This is the new mainstream line-up after P. It includes somewhat heavier and faster laptops, in fair prices. Its models include R45, R50, R65, etc.(discontinued) or R40(budget Core 2 Duo laptop), R55/R70(high-end), R19/R20. For new Samsung laptops having Core i Series CPUs, they use RF line instead of R line. R480 R580 R780 R590 RC Series RC410 RC420 RC510 RC512 RC710 RC720 RC530 RC730 RF Series RF410 RF411 RF510 RF710 RF511 RF711 RF712 RV Series RV409 RV411 RV413 RV415 RV511 RV515 RV420 RV520 RV711 RV720 SF Series SF310 SF311 SF410 SF411 SF510 SF511 X Series X- This Sens is a thin and light notebook - a kind that shares the characteristics of an ultraportable with exception of being heavier, wider in screen size, and stronger in processing power. It is around 14 inches, such as X06, X1(discontinued) and X11(Core 2 Duo). From i-series CPUs, they continue X series with SF series. G Series Sens also has G models, which are laptops without batteries, or to be exact, mobile desktops. It is a budget PC series being very heavy in weight and low processing power. It has two models, G10 and G15. References Category:Laptops Category:Consumer electronics brands Sens
</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.