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: Regina:  Listen . What were those numbers which you said when we came in ?
Luisinho: Ah , those were your number and hers .
Regina: What number ?
Luisinho: Your entrance number . You 're 367 .
Regina: That 's ridiculous . Not even 20 year - old boys do that anymore .
Luisinho: Why ? Did n't you like your number ?
Regina: Why do n't you number your sister ?
Luisinho: Because I do n't have _ one _ . If I did , I 'm not so sure . Soon , you 'll start liking me .
Regina: Whatever . For me , you 're number 1800 .

sister