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". 

[EX Q]: Topic: Open primaries
 Argument: If people want choice in a party, they should join it.
[EX A]: in favor

[EX Q]: Topic: Banning vuvuzela horns at the 2010 World Cup
 Argument: Ear plugs can effectively limit any damage from vuvuzela.
[EX A]: against

[EX Q]: Topic: Mandatory military service
 Argument: National service produces valuable character traits:.
[EX A]:
in favor