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 summarize this paragraph in one sentence. 

May Day is a public holiday usually celebrated on 1 May. It is an ancient Northern Hemisphere spring festival and a traditional spring holiday in many cultures. Dances, singing, and cake are usually part of the festivities. In the late 19th century, May Day was chosen as the date for International Workers' Day by the Socialists and Communists of the Second International to commemorate the Haymarket affair in Chicago. International Workers' Day can also be referred to as "May Day", but it is a different celebration from the traditional May Day.
Response: A traditional Spring festival in many cultures, Socialists and Communists of the Second International chose May Day to commemorate the Haymarket affair and to be International Worker's Day. 

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.

Please summarize this text in one sentence. World War II was a global war that lasted from 1939 to 1945, involving many of the world’s countries, including all of the great powers, which eventually formed two opposing military alliances: the Allies and the Axis. It was the most widespread war in history and directly involved more than 100 million people from over 30 countries. Marked by significant events involving mass death of civilians, including the Holocaust and the only use of nuclear weapons in war, World War II resulted in an estimated 70 to 85 million fatalities.
user
World War II, from 1939 to 1945, was a global war involving over 30 countries and resulting in 70 to 85 million deaths, marked by significant civilian casualties, the Holocaust, and the use of nuclear weapons.
assistant