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.
Q: 孩子的鞋带解开了。
(1)他学会了如何把他们绑起来。(2)他在操场上跑来跑去。
A: 
2