Instructions: In this task you are given a premise and two alternatives in Chinese. 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.
Input: 男孩被绊倒了。
(1)他的夹克被解开了。(2)他的鞋带解开了。
Output:
2