Task: Question Answering
Input (English): Passage: One day we went to the pet store to adopt a new kitten . There were lots of kittens to choose from . Three were gray , two were black and one was black and white and brown .  Lots of people were already there and cuddling kittens , but two of the gray kittens were playing on the floor with some toys .  The boy cat had short , silky fur , and the girl cat had long , fluffy fur . My son and daughter sat down with the kittens . The kittens climbed all over them and wanted to play .  It was very cute !  We had originally only wanted one kitten , but these two were so adorable that we decided to get both of them .  We bought some kitten food , a new cat bed and lot of new toys for them to play with .  On the drive home they sat in their box on the backseat between my son and daughter . Everyone was very happy . Question: What were brother and sister? Option1: son and daughter Option2: parents
Output (English): son and daughter