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: Please give me a summed up version of the following:

Fox News reached a last-second settlement with Dominion Voting Systems on Tuesday as the case raced toward opening statements, paying more than $787 million to end a colossal two-year legal battle that publicly shredded the right-wing network’s credibility.

Fox News’ $787.5 million settlement with Dominion Voting Systems is the largest publicly known defamation settlement in US history involving a media company.

The deal was announced hours after the jury was sworn in at the Delaware Superior Court. Rumors of a settlement swirled in the courthouse when, after a lunch break, the proceedings dramatically ground to a halt for nearly three hours with no explanation, while the parties apparently hammered out an accord.
Response: Fox News settled with Dominion Voting Systems and paid more than $787 million after two years of legal battles for a defamation suit. Just before the settlement, the jury had already been sworn in, and there were three hours of no information being shared while the settlement was made.

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 information:

The Great Wall of China is a series of fortifications made of various materials such as stone, brick, tamped earth, and wood. Built along the northern borders of China to protect against various nomadic groups, it was constructed by multiple dynasties over centuries, from as early as the 7th century BC to the 17th century AD. The wall stretches over 13,000 miles and includes watchtowers, barracks, and signal stations. Despite popular belief, it is not visible from space without aid.
user
The Great Wall of China, built over centuries to protect against nomadic invasions, spans over 13,000 miles. Constructed with various materials, it includes watchtowers and signal stations but is not visible from space unaided.
assistant