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: Robespierre: We in Paris are aware of the danger , Citizen . We live in troubled times . There is much , much work to be done , work that is constantly delayed by the need to ferret out the traitors that we harbor in our midst ...
Dr. Who: Is there really such a need , Citizen Robespierre ? Hmm ? I mean , what can this Reign Of Terror possibly gain ? For every opponent you put to the guillotine , _ two _ more will spring up !
A:
opponent