Given the task definition and input, reply with output. Given a premise and two alternatives, choose the alternative that is a more plausible cause or effect of the situation described by the premise. The input format is "premise
(1)alternative_1(2)alternative_2", the output should either be "1" or "2" based on your judgment.

A boom reverberated across the stage.
(1)The musician tapped his foot.(2)The musician pounded the drum.

2