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: Free public transportation
 Argument: Car sales would drop significantly.
Example Output: against

Example Input: Topic: Banning vuvuzela horns at the 2010 World Cup
 Argument: Guests at World Cup should embrace S. African vuvuzela tradition.
Example Output: against

Example Input: Topic: Carbon capture and storage
 Argument: CCS passes C02-leakage problem to our children.
Example Output:
against