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: Lowering US drinking age from 21 to 18
 Argument: 21 drinking-age general lowers under-age drinking.
Example Output: against

Example Input: Topic: Hydrogen vehicles
 Argument: Hydrogen is non-toxic, unlike most fossil fuels.
Example Output: in favor

Example Input: Topic: Israeli settlements
 Argument: Settlements undercut Palestinian rights to land.
Example Output:
against