Task: Question Generation
Input (English): Context: The bridge is wood , 2X4 's spaced just far enough apart that the ride in the stroller was pretty bumpy , which is why he quieted . So , we went to Tim Horton 's in Mack 's building for breakfast , which was good . Then Owen and I walked home . He was quiet the whole way , but woke up as I arrived home .
Output (English): Why did the bumpy ride cause him to quieten ?