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: Full-body scanners at airports
 Argument: Full-body scanners will slow airport security check-points.
Example Output: against

Example Input: Topic: Lowering US drinking age from 21 to 18
 Argument: Many states allow under-age drinking with parents/spouses.
Example Output: in favor

Example Input: Topic: Cellulosic ethanol
 Argument: Cellulosic ethanol packs three-times the energy as corn ethanol.
Example Output:
in favor