Task: Question Answering
Input (English): Context: It seems that on most songs he has a word that he echoes . Like on the Bob Marley classic , " Three Little Birds , " he goes " You - ou - ou . " It 's kinda cute , really . And tonight , he only let me sing " Hi Lili " once before asking for " bed . " That 's the second time he 's cut short lullaby time to go to bed . 
Question: Why did he cut the lullaby short ?
Output (English): He was tired and wanted to go to bed .