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". 

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

Topic: Carbon capture and storage
 Argument: Carbon capture and storage requires significant water.
neutral

Topic: Banning vuvuzela horns at the 2010 World Cup
 Argument: Ear plugs can effectively limit any damage from vuvuzela.

against