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 following article in a few sentences.
A 48-year-old man arriving at work saw someone leaving the property with a stolen catalytic converter, according to police and news reports in Texas.
The two men got into a fight before the accused thief, 32, started running toward his truck in a nearby parking lot, the San Antonio Police Department reported.
Meanwhile, the 48-year-old got into his vehicle, according to KSAT. Their two trucks collided during the incident.
As the younger man was trying to escape in his vehicle, the 48-year-old shot him several times, authorities said in a report obtained by McClatchy News.
The 32-year-old man called police at 6:48 a.m. on Monday, May 1, police said, and officers responded to the 6100 block of San Pedro Avenue in north San Antonio.
Officers said they found a male victim shot inside a truck. He was rushed to a hospital with “life-threatening injuries.”
The accused shooter is an employee of a furniture store, KSAT reported.
He was arrested on a charge of aggravated assault with a deadly weapon while at the scene, police said.
Response: On Monday, May 1, a 48-year-old man was arriving at work when he saw someone leaving the property with a stolen catalytic converter. The accused thief who was 32, ran to his car, and the 48-year-old got back into his vehicle. The two vehicles collided. While the younger man was trying to escape, the 48-year-old man shot him several times. The accused thief was rushed to the hospital with life-threatening injuries and the 48-year-old man was arrested on a charge of aggravated assault with a deadly weapon.

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 following text in a few sentences.

The expansion of the universe has been a topic of great interest and debate among scientists. Edwin Hubble's observations in the 1920s revealed that distant galaxies are moving away from us, implying that the universe is expanding. This led to the formulation of the Big Bang theory, which posits that the universe began from an extremely dense and hot state. Recent measurements of cosmic microwave background radiation have provided further support for this theory. However, questions remain about the rate of expansion, known as the Hubble constant, and whether it is influenced by a mysterious force called dark energy.
user
Edwin Hubble's 1920s observations showed that distant galaxies are receding from us, indicating the universe is expanding, which led to the Big Bang theory. Recent data from cosmic microwave background radiation supports this theory. Ongoing questions include the exact rate of expansion, the Hubble constant, and the influence of dark energy.
assistant