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: Summarize the why the WGA may go on strike in such a way that a 2nd grader could understand.

Hollywood is facing its first potential writers' strike in 15 years.

The Writers Guild of America (WGA), which represents thousands of television and movie writers, voted overwhelmingly on Monday to authorize a strike if a deal with major studios was not reached by May 1 — the day the guild's three-year contract expires.

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A strike would cause a production shutdown and affect the biggest companies in Hollywood as scripted series across both network television and streaming grind to a halt.

The WGA has been negotiating with the Alliance of Motion Picture and Television Producers (AMPTP), which bargains on behalf of the studios. The talks have centered on pay concerns brought on by the streaming boom, in addition to other fundamental changes within entertainment like the recent wave of cost-cutting that has prompted media giants from Disney (DIS) to Warner Bros. Discovery (WBD) to enact mass layoffs and shelve multiple projects.

Response: The people who write the stories for movies and TV in America may refuse to work because they feel they aren't getting enough money, too many people have been fired from their jobs, and they were told to stop on too many of the projects they started.

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.

Describe why we have day and night in simple terms.
user
We have day and night because the Earth spins around. When your part of the Earth faces the sun, it's day, and when it faces away, it's night.
assistant