Detailed Instructions: In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.
See one example below:
Problem: Article: There are a lot of public libraries in Britain. These libraries have more than one hundred and fifteen million books, not including those libraries of public schools. Public libraries not only lend books, music records but also help children, patients in hospitals and others to get special play readings, film shows and so on. The first public libraries were founded in about the year 1850. Today's public libraries usually have a reading-room, a lending room and a reference room. The greatest and most famous library in Britain is that of the British Library in London. It was founded in 1973 and has over 10, 000, 000 books. It has nearly every magazine, newspaper and book published in Britain and other parts across the world.
Answer: 10,000,000 or less.
Solution: How many books are there in the British Library?
Explanation: In the Article, 10,000,000 is mentioned for the number of books available in the British Library, so this is a good question.

Problem: Article: Krakatau volcano is in a small island in Indonesia. It had been peaceful for about 200 years before it erupted in 1883. The first signs of the activity of the volcano appeared in May 1883, when fire and smoke could be seen at the top of the mountain. Great noise could be heard even in Jakarta a hundred miles away. Later the activity grew much greater. The peak was covered with smoke and fire; the smoke at one time was seventeen miles high in the air. The lava--soft and hot rock--shot up into the air and rolled down the sides of the mountain. The mouth of the volcano was not at the peak of the mountain but on its side, close to the sea. As it grew bigger and bigger with the eruption, the sea water got into it. When the sea water reached the lava inside the volcano, it made the upper part of the lava colder and harder. And this sealed off the rest of the lava below. As the inside of the lava could not break through the seal, the pressure built up until the mountain blew up. The eruption of the volcano was followed by several earthquakes which brought about bad result. About 36000 people were killed and many towns and villages near the sea were completely destroyed by the great waves which the earthquake caused.
Answer: All the above.
Solution:
What makes volcanoes erupt?