Provide a concise summary of the key information discussed in the following text about the formation of stars:

Stars are massive celestial bodies composed primarily of hydrogen and helium gas that shine brightly due to the nuclear fusion reactions occurring in their cores. The formation of a new star begins with the gravitational collapse of a giant molecular cloud – a massive, dense, cold cloud of gas and dust in interstellar space. As the cloud contracts under its own gravitational attraction, pockets of higher density develop and these condensed cores begin to spin and slowly accumulate additional material from the collapsing cloud. Once a dense, hot core of sufficient mass forms, nuclear fusion of hydrogen into helium begins, releasing the immense energy that causes the star to radiate brilliantly. Massive stars burn their fuel much more rapidly than smaller stars and thus have shorter lifetimes of only a few million years. Smaller stars like the Sun, on the other hand, can shine for billions of years before depleting their hydrogen fuel and entering into later evolutionary stages.
Provide a concise summary of the key information discussed in the following text about the formation of stars:

Stars are massive celestial bodies composed primarily of hydrogen and helium gas that shine brightly due to the nuclear fusion reactions occurring in their cores. The formation of a new star begins with the gravitational collapse of a giant molecular cloud – a massive, dense, cold cloud of gas and dust in interstellar space. As the cloud contracts under its own gravitational attraction, pockets of higher density develop and these condensed cores begin to spin and slowly accumulate additional material from the collapsing cloud. Once a dense, hot core of sufficient mass forms, nuclear fusion of hydrogen into helium begins, releasing the immense energy that causes the star to radiate brilliantly. Massive stars burn their fuel much more rapidly than smaller stars and thus have shorter lifetimes of only a few million years. Smaller stars like the Sun, on the other hand, can shine for billions of years before depleting their hydrogen fuel and entering into later evolutionary stages.
user
Stars form from the gravitational collapse of giant molecular clouds of gas and dust in space. As the cloud contracts, dense spinning cores develop that accumulate more material until nuclear fusion ignites in the hot, massive core, causing the object to shine brightly as a new star. Massive stars burn through their fuel rapidly and have short lifetimes, while smaller stars like the Sun can shine for billions of years.
assistant
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 discovery mentioned in the document.

Here’s the document I was talking about:
Now, people are only just realising that there’s a massive ocean hidden under the Earth’s crust.

It turns out there’s a huge supply of water 400 miles underground stored in rock known as 'ringwoodite'.

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Scientists previously discovered that water is stored inside mantle rock in a sponge-like state, which isn’t a liquid, solid or a gas, but instead a fourth state.

The scientific paper titled ‘Dehydration melting at the top of the lower mantle’ was published in 2014 and laid out the findings.

There's three times as much water below the surface than in the oceansiStock

"The ringwoodite is like a sponge, soaking up water, there is something very special about the crystal structure of ringwoodite that allows it to attract hydrogen and trap water," said geophysicist Steve Jacobsen at the time.

"This mineral can contain a lot of water under conditions of the deep mantle,” added Jacobsen, who was part of the team behind the discovery.

From that, they were able to establish that the water was being held in the rock known as ringwoodite.

If the rock contained just 1 per cent water, it would mean that there is three times more water under the surface of the Earth than there is in the oceans on the surface.
Response: Published in 2014, a paper entitled, “Dehydration melting at the top of the lower mantle,” detailed the discovery by scientists that there is water stored inside mantle rock beneath the ocean, approximately 400 miles underground. Geophysicist Steve Jacobsen described the water stored there as being in a sponge-like state in a mineral rock called ringwoodite. It is estimated that there is three times as much water below the surface as above it.

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.
