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: Tell me in brief what the news article said. 

A 17-year-old girl was killed and five other people were wounded in a shooting early Saturday at a party near a college campus in Northern California, police said.

Officers responding around 3:30 a.m. to reports of gunfire found six people shot at an apartment building in Chico, police Chief Billy Aldridge said.

All the victims were taken to hospitals, and the teenager died at a hospital, he said.
Response: Six people were taken to a hospital after being shot at a party near a college campus in Northern California. Police responded and the wounded were taken to the hospital, where one of the victims a 17-year-old girl died. 

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.

Summarize the main findings of the medical study.
user
The medical study found that regular exercise significantly reduces the risk of chronic diseases such as diabetes and heart disease, while also improving mental health and overall longevity.
assistant