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: Jo Grant:  What on earth is he doing inside a horsebox ?
Doctor Who: It is n't exactly a horsebox . It just happens to look like _ one _ .
Jo Grant: You mean there is n't a horse inside ?
Doctor Who: No more than there 's a policeman inside my police box .

horsebox