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: Special Agent Leroy Jethro Gibbs:  She knew she was pregnant . Any idea about the father ?
Special Agent Anthony DiNozzo: She used a pay phone to call him , but his cell was turned off . She said she left a message .
Agent Caitlin 'Kate' Todd: That 's your worst nightmare , Tony .
Special Agent Anthony DiNozzo: So , how 's it going with those letters , Kate ?
Agent Caitlin 'Kate' Todd: I 'm working on it . Thanks , Tony .
Special Agent Leroy Jethro Gibbs: How long ?
Agent Caitlin 'Kate' Todd: Two days , three tops .
Special Agent Leroy Jethro Gibbs: You 've got _ four _ .
Agent Caitlin 'Kate' Todd: Really ?
Special Agent Leroy Jethro Gibbs: Hours .
Agent Caitlin 'Kate' Todd: Sounds about right .

days