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: On the site of the 9/11 tragedy, Irish university professor Elizabeth Stinger Keefe found an image of hope-- a wedding photo of a happy couple and their friends lay among the rubble of the Twin Towers. As a gesture of goodwill, she decided to try and reunite the picture with either its owner or a . Every year, on the anniversary of the terrorist attacks, she would make an attempt, posting the picture on social media and asking others to share it. Finally, after a remarkable 13 years, her work paid off. Thanks to the power of social media, her appeal was more widely shared than ever before. A man named Fred Mahe called Ms Keefe after the image went viral -- to tell her that he was in fact in the picture and that all six people photographed were alive and well. He said that the image belonged to him and had been lost in the rubble after 9/11.The photo was originally taken at a friend's wedding in Colorado, earlier in 2001. Mahe said, "The picture was at my desk in the world Trade Center, Tower Two, on the 77th floor. I never thought it could have been kept safe by Keefe for the last 13 years." Mahe said that he was in touch with Keefe over the phone and described the conversation as "dedication and persistence" to continue to seek the owner of the photo. "She kept my photo safe for 13 years in her favorite Ernest Hemingway book, A Moveable Feast." Mahe said he wasn't yet at work as the attacks began on 9/11, and, "thankfully never got a chance to go up to my office." And Mahe's wife has even invited Keefe to Thanksgiving dinner. Now the pair have reconnected with a piece of their past as Keefe has finally returned the picture to its rightful owner and has made a new friend in the process.
Answer: Because she wanted to find its owner.
Solution:
Why did Keefe want to keep the picture she found?