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: Marcus Dixon:  No , this does not MAKE ANY SENSE !
Sydney Bristow: YOU HAVE TO LISTEN TO ME ! I ca n't go back there or they will kill me too ! We need you to go into SD-6 . We need you to hack into the system and make visible a hidden file , _ one _ that you would never see , never know was there . It 's a code . A number that we need . If it 's a match to one we already have , it will confirm the data and the CIA will raid SD-6 and every Alliance office ! If you follow these instructions to get the code you will be in the core of the SD-6 computer network and you 'll see ... it 's not CIA . It 's Alliance . I 'll wait for your e - mail but you need to hurry .

file