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: 书从书架上掉了下来。
(1)架子上满是灰尘。(2)一场地震震动了书架。

A: 2
****
Q: 我觉得很无聊。
(1)我哼了一声。(2)我打哈欠了。

A: 2
****
Q: 我点燃了蜡烛。
(1)蜡从蜡烛上掉下来。(2)蜡烛上的蜡变硬了。

A:
1
****