Given the Target and Argument texts detect the stance that the argument has towards the topic. There are three types of stances "in favor", "against", and "neutral".

Example Input: Topic: UN Security Council veto
Argument: Vietnam supports banning UN security council veto power.
Example Output: in favor

Example Input: Topic: Is a nuclear Iran intolerable?
Argument: A nuclear Iran would use oil as a weapon.
Example Output: against

Example Input: Topic: Corporate free speech
Argument: General statements against Citizens United ruling.
Example Output:
neutral