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.
Example: 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.
Example solution: How many books are there in the British Library?
Example 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: Going to outer space is a little like going camping. You have to carry with you all the food and equipment you need for your trip, so your food can't be too heavy or hard to prepare. Plus, there are no refrigerators to keep food cold and fresh. Food with all the water dried out is lightweight and doesn't spoil. So, many space foods are dried on Earth and stored in special packets. Some taste good right out of the packet. On earth, gravity is the force that keeps your feet on the ground and your sandwich on your plate. But there's no gravity in space. To keep food from floating away, astronauts on the Space Shuttle attach the packets to a special tray. The tray can be fixed to a wall or to the astronaut's lap. To prepare their food, astronauts use liquid forms of salt and pepper. The liquid sticks to the food better. Regular salt and pepper would float away, maybe up an astronaut's nose. Liquids float right out of cups and glasses, though. So astronauts drink everything from a small bag with a straw that can be closed. Astronauts say that most space foods taste pretty good. Some, such as apples and pudding, are the same as the foods you eat on Earth. Astronauts eat tortillas instead of bread because they make fewer crumbs . Floating crumbs could get stuck in equipment or an astronaut's eye. Your body used food in space the same way it does on Earth. Your body must deal with waste in space too. During takeoff the landing, astronauts can't leave their seats to go to the bathroom. They wear diapers under their spacesuits instead. The Space Shuttle has a bathroom the size of a small closet. The toilet has bars that keep astronauts from floating away. A strong flow of air is used instead of water to flush waste down the toilet. Back on Earth it's flushed away-or sometimes studied by scientists.
Answer: Liquid is convenient to use in space.
Solution: Why do astronauts use liquid forms of salt and pepper to prepare food?