instruction:
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". 
question:
Topic: Banning vuvuzela horns at the 2010 World Cup
 Argument: They are a source of headaches.
answer:
in favor


question:
Topic: Oil sands
 Argument: Oil sands threaten down-river communities.
answer:
against


question:
Topic: Employee Free Choice Act
 Argument: EFCA is biased toward punishing employers and not unions.
answer:

against