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: Megan Hunt:  I estimated she 's been dead for at least 2 days . How fast can you confirm that ?
Curtis Brumfield: There are 6 stages from egg to adult , I need to grow these little guys out and then calculate backwards . 20 days , maybe _ 25 _ ?
Megan Hunt: I want tomorrow !
Curtis Brumfield: I 'll do my best

days