You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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.

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?
Why? In the Article, 10,000,000 is mentioned for the number of books available in the British Library, so this is a good question.

New input: Article: Although in 1947 we were still very new to the atomic age,  we knew about mushroom clouds. A huge crack spread across the library wall upstairs, sending teachers and students screaming down the hall. Had a new world war started? Pale-faced, our young science teacher quickly organized us for a fire drill. We huddled in little groups on the beach side of the school grounds and watched the spreading cloud darken the bright spring sky. Rumors flew every which way, although two hours would pass before we got the full story.One rumor we heard was that the Texas City Monsanto Chemical plant had blown up; children whose parents worked there began to weep. I froze--that was where my father was working that day. The school bell called us back inside, and we were dismissed to find our way home the best way we could. I-d walked a quarter of the three-mile trip to my home when a car horn startled me to attention. My Uncle Barney pulled up alongside me in his old Ford. The instant I saw him, I knew my father was gone. Otherwise, Papa would have come for me himself. As if in slow motion from a great distance, Uncle Barney motioned for me to get in. Numb with grief,  I crawled into the back seat.  I barely took notice of the man sitting there, and didn't recognize him until he reached for me.  When Papa put his strong arms around me, I forgot for a moment that Cherokees  aren't supposed to cry. Many of my fellow students lost their parents in the explosion.  Tragedy would one day come to our family, as it inevitably comes to all, but on the day Texas City blew up, it miraculously passed us by. Because he lost his keys on that April morning, as he explained, my father lived for another 32 years-we were to have a second lifetime forever. 
 Answer: He acted quickly.
Solution:
How did the science teacher react to the accident?