Instructions: 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: Amy Pond:  What are we doing ?
The Doctor: We 're running into a dead end , where I 'll come up with a brilliant plan that basically involves not being in _ one _ .
Output:
end