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". 

Example Input: Topic: Geoengineering, solar shading
 Argument: Sunshield costs are reasonable in face of global warming.
Example Output: in favor

Example Input: Topic: UN Security Council veto
 Argument: The UN veto fosters a system of checks and balances.
Example Output: in favor

Example Input: Topic: Single-payer universal health care
 Argument: Universal health care is not free; people pay with their taxes.
Example Output:
against