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: The Doctor:  Okay , okay . Tch , tch . First things first . _ One _ : we 're going to climb through this ship . B ... no ... two : we 're going to reach the bridge . Three - or C : we 're going to save the Titanic . And , coming in a very low Four or D or that little " iv " in brackets they use in footnotes ... why . Right then , follow me .

things