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: Health experts have discovered that adding low-calorie vegetable soup to the start of a meal can actually help to lose weight. Because you feel full sooner, you eat less of your main course. The soup regime was tested by researchers at Pennsylvania State University, led by Dr Barbara Rolls. They found that when people ate a first course of soup before lunch they reduced their total calorie intake by 20 per cent, compared with those who did not begin the meal with soup. But those who _ creamy soups should be careful.Researchers stressed the soup must be low-calorie and based on stock , not cream. All of the soups tested in the study were made from identical ingredients - chicken stock , broccoli , potato, cauliflower and carrots. They were mixed together to create four different textures and thickness from separate stock and vegetables through to pureed soup. Scientists thought that thick soups with chunks of vegetables which required chewing might be more filling, but to their surprise they found all forms had the same effect. The findings were presented to the Experimental Biology conference in Washington, DC, and the research was part-funded by the National Institutes of Health.
Answer: You can feel full soon after having the soup.
Solution: What's the reason that adding low-calorie vegetable soup to the start of a meal can actually help to lose weight?