Given the task definition, example input & output, solve the new input case.
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: Topic: Three Gorges Dam
 Argument: The Three Gorges Dam is a cause of corruption.
Output: against
Here, argument is against the given topic, three gorges dam. Hence, the answer is "against".

New input case for you: Topic: Carbon capture and storage
 Argument: Algae CCS produces valuable bi-products.
Output:
in favor