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: Banning vuvuzela horns at the 2010 World Cup
 Argument: Vuvuzelas can be used as weapons.
in favor

Topic: Dollarization
 Argument: Dollarization undermines the sovereign symbolism of a national currency.
against

Topic: EU elected president
 Argument: Strong presidential state powers are unnecessary and uncalled for.

against