instruction:
In this task, you're given an open-domain question. Your task is to provide an answer to the given question. There is only one unique answer for each question. Your answer should be short, and refer to an entity, date, number, etc. Do not put your answer in the context of a sentence.
question:
Star trek the next generation number of episodes?
answer:
178


question:
Who played jane tennison in prime suspect 1973?
answer:
Stefanie Martini


question:
What were the cause of the american civil war?
answer:

conflicts over slavery