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". 

Q: Topic: Ban on laser pointers
 Argument: Laser pointers are in popular demand.

A: against
****
Q: Topic: Colonization of the Moon
 Argument: Growing crops on the moon faces many difficult challenges.

A: against
****
Q: Topic: Natural gas vehicles
 Argument: Natural gas burns more cleanly than gasoline in general.

A:
in favor
****