Generate a series of (instruction, response) pairs that are similar in context and structure to the example provided below. Each pair should consist of a concise instruction followed by an appropriate, detailed response. The instruction should pose a clear task or question, while the response should provide a comprehensive answer or solution that could be understood by someone with a basic understanding of the subject.

Example pair: 
Instruction: Write a short summary of the passage.

This is the passage:
The most famous description of Valhalla in Old Norse literature, that of Grímnismál, portrays it as being located in Asgard, the gods’ celestial fortress.

However, other lines of evidence suggest that it was at least sometimes seen as being located underground, like the more general underworld.
Response: Grímnismál is the most famous portrayal of Valhalla, locating it in Asgard, but other theories say it was underground.

Your task is to generate more pairs that maintain this level of clarity and detail. The topic is Summarization. Write a long text of instruction by yourself, then summarize the given instruction in a response. Ensure that the responses are informative and accurate, suitable for an educational context. 

Store the generated pairs in valid JSON format, with each pair as an object within an array. Each object should have two key-value pairs: "instruction" and "response". For instance: 

{"contents": [{"instruction": "text", "response": "text"}, {"instruction": "text", "response": "text"}, ...]} 

Remember to maintain consistency in the format and ensure the generated pairs are diverse and cover a broad range of subjects. You must return the response in the asked format and you must not add any additional text in your response.

Explain the importance of identifying the central idea when summarizing a text and provide strategies for doing so.
user
Identifying the central idea is crucial when summarizing a text because it serves as the foundation for understanding the author's primary message or argument. Without grasping the central idea, the summary may lack focus and fail to capture the essence of the text accurately. To identify the central idea, employ strategies like: 1) Look for repetition of key words or concepts throughout the text. 2) Pay attention to introductory and concluding paragraphs, as they often state or reinforce the main idea. 3) Consider the title and headings, which can provide clues about the central topic. 4) Analyze the thesis statement or main argument presented by the author. 5) Distinguish between main ideas and supporting details, focusing on the overarching concept or theme.
assistant