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.

Summarize the main ideas in the following text about the water cycle:

The water cycle, also known as the hydrologic cycle, is the continuous movement of water on, above, and below the surface of the Earth. It involves several processes, including evaporation, condensation, precipitation, and runoff. Water from oceans, lakes, and rivers evaporates into the atmosphere as water vapor. As the vapor rises, it cools and condenses into clouds. When the condensed water droplets become too heavy, they fall back to the Earth's surface as precipitation in the form of rain, sleet, snow, or hail. Some precipitation soaks into the ground, replenishing underground aquifers and soil moisture, while the rest flows across the surface as runoff into streams, rivers, and eventually back into the oceans, completing the cycle. The water cycle is a crucial process that helps distribute water around the planet and sustain life on Earth.
user
The main ideas are: 1) The water cycle is the continuous movement of water through evaporation, condensation, precipitation, and runoff. 2) Water evaporates from water bodies into the atmosphere as vapor. 3) Vapor condenses into clouds, which release precipitation back to the Earth's surface. 4) Precipitation either soaks into the ground or flows as runoff into water bodies. 5) The cycle allows for distribution of water globally and sustains life on Earth.
assistant