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: What does this text say about the term borough in New York City:

The term borough was adopted in 1898 to describe a form of governmental administration for each of the five fundamental constituent parts of the newly consolidated city. Under the 1898 City Charter adopted by the New York State Legislature, a borough is a municipal corporation that is created when a county is merged with populated areas within it.[1] The limited powers of the boroughs are inferior to the authority of the government of New York City, contrasting significantly with the powers of boroughs as that term is used in Connecticut, New Jersey, and Pennsylvania, where a borough is an independent level of government, as well as with borough forms used in other states and in Greater London.[2]
Response: The term "borough" describes the governmental administration of each of the five constituent parts of New York City, The term's use began with the 1898 City Charter which states that each borough is a municipal corporation created when a county is merged with populated areas. The powers of the boroughs are inferior to those of the government of New York City which is in contrast to the term "borough" used in other locations such as Connecticut, New Jersey, Pennsylvania, and Greater London.

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.

Give an overview of how the human digestive system works based on the following text:

The human digestive system is a complex series of organs and glands that processes food. It involves several stages: ingestion, digestion, absorption, and excretion. Food enters the mouth, where it is chewed and mixed with saliva to begin breaking down. It then travels down the esophagus to the stomach, where acids and enzymes further digest it. Nutrients are absorbed mainly in the small intestine, where they enter the bloodstream. The remaining waste products proceed to the large intestine, where water is absorbed, and the waste is ultimately excreted through the rectum and anus.
user
The human digestive system processes food through ingestion, digestion, absorption, and excretion. Food is chewed in the mouth, digested in the stomach, nutrients absorbed in the small intestine, and waste is excreted through the rectum.
assistant