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: Can you give me a quick rundown on Ostriches as large flightless birds from this text?

Take the information for the summary from the text below:

Ostriches are large flightless birds. They are the heaviest living birds, and lay the largest eggs of any living land animal. With the ability to run at 70 km/h (43.5 mph), they are the fastest birds on land. They are farmed worldwide, with significant industries in the Philippines and Namibia. Ostrich leather is a lucrative commodity, and the large feathers are used as plumes for the decoration of ceremonial headgear. Ostrich eggs have been used by humans for millennia.

Ostriches are of the genus Struthio in the order Struthioniformes, part of the infra-class Palaeognathae, a diverse group of flightless birds also known as ratites that includes the emus, rheas, cassowaries and kiwis. There are two living species of ostrich: the common ostrich, native to large areas of sub-Saharan Africa, and the Somali ostrich, native to the Horn of Africa.[2] The common ostrich used to be native to the Arabian Peninsula, and ostriches were present across Asia as far east as Mongolia during the Late Pleistocene and possibly into the Holocene.
Response: Ostriches are big, flightless birds that are the heaviest species of birds in the world. They are capable of running at speeds of up to 70km/h on land. Their eggs are the largest of any land animal and humans have been using them for thousands of years. In the Philippines and Namibia, ostrich farming is a major industry because of the value of their feathers and leather. There are two living species of ostrich: the common ostrich and the Somali ostrich.

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's the main idea about the Great Wall of China's function as described in the passage?

The Great Wall of China was primarily built to protect the Chinese states and empires from the raids and invasions of various nomadic groups of the Eurasian Steppe. Apart from defense, it also served for border control, allowing the imposition of duties on goods transported along the Silk Road, regulation of trade and immigration, and control over travel. The Great Wall ceases to have military significance after the fall of the Ming Dynasty.
user
The Great Wall of China was mainly constructed to defend against invasions from nomadic groups and to regulate trade and immigration. It also functioned as a means to control travel and impose duties on goods along the Silk Road.
assistant