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: Singapore is a dynamic city-state where you will find a harmonious mixture of culture, cuisine, arts, people and architecture. If you have at least 5 hours to spare in transit before your next flight, join us in one of our free two-hour guided tours, which runs daily at regular times. Registration for the tour must be made at least one hour before the start of the tour. *HERITAGE TOUR Tour Timings: 9:00 am to 11:00 am 11:30 am to 1:30 pm 2:30 pm to 4:30 pm 4:00 pm to 6:00 pm The heritage tour has a short stopover at the Merlion Park before going to the Colonial District, Central Business District and Chinatown or Little India. The journey to the Merlion Park offers you a entire view of Singapore's landmarks like Marina Bay Sands, Singapore Flyer and Gardens by the Bay. The tour will bring you through a discovery journey where you will have a glimpse of a unique mixture of East and West, tradition and modernity. It will be a splendid way for you to explore the history, culture and lifestyle of multi-racial Singapore while in your transit. *CITY LIGHT TOUR Tour Timings: 6:30 pm to 8:30 pm As night falls, Singapore takes another look to offer an entertainment choice. The City Light Tour brings you to various attractions in Singapore. As the journey begins from Changi Airport towards Benjamin Sheares Bridge, you will get a wide view of Singapore's famous symbols- the Singapore Flyer, Marina Bay Sands and Esplanade. Next, you will see the Helix Bridge which is inspired by the double helix of our DNA structure.
Answer: 4:00 pm to 6:00 pm
Output:
If it is 2: 45pm now and Mike's plane is going to take off at 8:35pm, which is the best timing for him?