Definition: In this task, you will use your knowledge about language (and common sense) to determine what element the marked number refers to. The numbers are marked with two underlines around them, like: _ number _. Your answer should be chosen from the given text, and should not contain other words.
Input: Lilith:  No , you do n't understand . Usually , we do n't get attached to the rats , but this _ one _ was so special . We even named him . Everyone in the lab called him Whitey .
Carla: Are you sure they were n't talking to you ?
Lilith: No , Carla , they were talking about Whitey the rat .
Carla: Okay , I 'll ask again . Are you sure they were n't talking to you ?

rats