Given the task definition and input, reply with output. In this task you are given a premise and two alternatives in Vietnamese. You must choose the alternative that is more plausibly the 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.

Quả bóng bowling làm ngã hết cái trụ bowling.
(1)Người đàn ông lăn quả bóng bowling xuống đường băng.(2)Người đàn ông thả quả bóng bowling xuống chân mình.

1