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". 
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Question: Topic: NATO expansion
 Argument: The expense of NATO expansion is marginal when compared to the defence budgets of the major NATO States.

Answer: in favor


Question: Topic: Gay marriage
 Argument: Gay marriage threatens cultural tradition of marriage.

Answer: against


Question: Topic: Banning vuvuzela horns at the 2010 World Cup
 Argument: Vuvuzelas can disrupt national anthems and award ceremonies.

Answer:
in favor