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: Cluster bomb ban
 Argument: Cluster bombs are usually used in uninhabited areas.
against

Topic: Lowering US drinking age from 21 to 18
 Argument: Many states allow under-age drinking with parents/spouses.
in favor

Topic: Privatizing social security
 Argument: Costly privatization of Soc Sec would dampen econ growth.

against