Detailed 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.
Q: Batman: You still have me at a loss , Ra 's al Ghul . Just how did you learn who I am ?
Ra's Al Ghul: I control a vast global organization , detective . Obviously Batman 's activities require certain costly implements . It was a simple matter for my people to learn which wealthy Americans were amassing what Batman might require . The _ one _ who matched my daughter 's description of you was Bruce Wayne .
Batman: Next time I 'll have to glue my mask on .
A:
Americans