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". 

Q: Topic: Cellulosic ethanol
 Argument: Cellulosic ethanol land-use harms forests, environment, climate.

A: against
****
Q: Topic: Banning vuvuzela horns at the 2010 World Cup
 Argument: They are a source of headaches.

A: in favor
****
Q: Topic: Banning cell phones in cars
 Argument: Fumbling for ringing phone while driving is dangerous.

A:
in favor
****