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:  Oh ! I 'm on your side , remember ? Hey , why did n't you wake me ? I should have been on watch half an hour ago .
Victoria: I thought you should rest .
The Doctor: Why me ?
Victoria: No reason , really .
The Doctor: Oh , I think I know . Is it because I 'm ...
Victoria: Well , if you are four hundred and fifty years old , you need a great deal of sleep .
The Doctor: Well , that 's very considerate of you , Victoria . But , between you and me , I 'm really quite lively actually - all things being considered . Are you happy with us , Victoria ?
Victoria: Yes , I am . At least , I would be if my father were here .
The Doctor: Yes , I know , I know .
Victoria: I wonder what he would have thought if he could see me now .
The Doctor: You miss him very much , do n't you ?
Victoria: It 's only when I close my eyes . I can still see him standing there . Before those horrible Dalek creatures came to the house . He was a very kind man . I shall never forget him . Never .
The Doctor: No , of course you wo n't . But , you know , the memory of him wo n't always be a sad _ one _ .
Victoria: I think it will . You ca n't understand , being so ancient .
The Doctor: Eh ?
Victoria: I mean old .
The Doctor: Oh .
Victoria: You probably ca n't remember your family .
The Doctor: Oh , yes , I can , when I want to , and that 's the point really .

memory