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: Explain to me what the main subject of this article is:

"California officials are investigating the disappearance of 30 tons (61,000 pounds) of ammonium nitrate from a railcar crossing the Midwest. Ammonium nitrate, which is used as fertilizer, can also be used to create explosives and was a key component in the homemade bomb used in the 1995 attack on the Murrah Federal Building in Oklahoma City. The chemical was shipped by train from Cheyenne, Wyoming last month but when it arrived in the Mojave Desert two weeks later, its holding car was empty and the nitrate was gone. Dyno Nobel, the company responsible for shipping the ammonium nitrate is a leader in commercial explosives and filed a report with the federal National Response Center (NRC) on May 10 and an investigation is currently underway.

The Federal Railroad Administration, the California Public Utilities Commission, Union Pacific, and Dyno Nobel are looking into the disappearance, and the railcar is being transported back to Wyoming to undergo a thorough inspection. It is unclear how or when the chemical disappeared during transit, but Dyno Nobel told KQED News, “The railcar was sealed when it left the Cheyenne facility, and the seals were still intact when it arrived in Saltdale. The initial assessment is that a leak through the bottom gate on the railcar may have developed in transit.”
Response: This article covers an ongoing investigation into the disappearance of 30 tons of ammonium nitrate that was being transported from Wyoming to the Mojave Desert by railcar. While mainly used as a fertilizer this substance can also be used as an explosive which raises security concerns.  Several agencies, including the California Public Utilities Commission, are investigating.

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.

What is the central theme of the text below: 'The Mars Rover, Perseverance, landed on the Red Planet in February 2021 with the mission of searching for signs of past life. Equipped with a suite of advanced scientific instruments, Perseverance is analyzing rock and soil samples to detect organic compounds and other bio-signature elements. Furthermore, the rover is testing new technology for future human missions to Mars, including producing oxygen from the Martian atmosphere.'
user
The central theme of the text is the mission of the Mars Rover, Perseverance, which landed on Mars in 2021 to search for signs of past life and test technology for future human missions, such as producing oxygen from the Martian atmosphere.
assistant