Given the task definition, example input & output, solve the new input case.
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.
Output: How many books are there in the British Library?
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 case for you: Article: Iceland is experiencing a book boom . It is hard to avoid writers in Reykjavik. There is a phrase in Icelandic, "ad ganga med bok I maganum", meaning everyone gives birth to a book. Literally, everyone "has a book in their stomach". One in 10 Icelanders will publish one. "Does it get rather competitive?" I ask the young novelist, Kristin Eirikskdottir. "Yes. Especially as I live with my mother and partner, who are also full-time writers. But we try to publish in alternate years so we do not compete too much." "Writers are respected here," Agla Magnusdottir tells me. "They live well. Some even get a salary." Magnusdottir is head of the new Icelandic Literature Centre, which offers state support for literature and its translation. "They write everything --- modern sagas , poetry, children's books, literary and extraordinary fiction --- but the biggest boom is in crime writing," she says. So what has led to this phenomenal book boom? I would say it is due to a crop of good writers, telling interesting tales with elegant economy and fantastic characters. Iceland's black lava riverbeds, its steaming, bubbling earth, with its towering volcanoes and fairytale streams also make it the perfect setting for stories. Solvi Bjorn Siggurdsson, an Icelandic novelist, says writers owe a lot to the past. "We are a nation of storytellers. When it was dark and cold we had nothing else to do," he says. "Thanks to the poetic works and medieval sagas, we have always been surrounded by stories. After independence from Denmark in 1944, literature helped define our identity." Siggurdsson shows respect to Iceland's Nobel Literature winner, Halldor Laxness, whose books are sold in petrol stations and tourist centres across the island. Locals name their cats after Laxness and pay a visit to his home. "When Laxness won the Nobel Prize in 1955 he put modern Icelandic literature on the map," Siggurdsson tells me. "He gave us confidence to write."
Answer: Children's stories.
Output:
What kind of book is the most popular in Iceland?