Task: Question Answering
Input (English): Context: It was cute - he 's such a Daddy 's boy . Oh , and that 's Ernie doing a walk - by . When I left Evie 's house , I went next door to Elliot 's . Elliot 's alien daughter Maggie ( the one with the same name as one of Emma 's kids , because I am bad and forgot I had already named this girl Maggie , and used the name again ) had her teen birthday . She is a pleasure sim who wants to top the slacker track . 
Question: Why did the narrator leave to go to Elliot 's house ?
Output (English): They were going to celebrate a birthday .