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: Prostitution
 Argument: By worsening HIV/AIDS, prostitution will devastate societies.
Example Output: against

Example Input: Topic: NATO expansion
 Argument: NATO expansion can only lead to the overstretching of the organisation and thus the undermining of stability for the entirety of Europe.
Example Output: against

Example Input: Topic: Natural gas
 Argument: Natural gas greenhouse emissions outweigh its utility at home.
Example Output:
against