Task: Question Answering
Input (English): Last night we went out with friends and needed to take a taxi home. First off we needed to find an available taxi. Once we found one we all hopped inside the taxi. We told the taxi cab driver where we wanted to go. There was a lot of traffic so it took a long while to get back to our hotel. Once we were at our hotel the taxi driver let us know what our total for the ride was. It came out to $15.00. My husband decided he would pay for it since some friends paid for our last round of drinks. We paid the taxi driver and all exited the taxi. We were very glad we found a taxi to take us home instead of walking the whole way. It was a very easy decision to make since we were all tired and it is a very big city! 
Question: Why did they take a taxi?
Output (English): they didn't have a car available