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.

交通灯变黄了。
(1)司机踩了刹车。(2)司机按响了喇叭。
1
The premise is: 交通灯变黄了. This means \"the traffic light turned yellow\".
Given the alternatives: (1) 司机踩了刹车 (the driver stepped on the brakes); and (2) 司机按响了喇叭 (the driver pressed the horn), it is most likely that alternative 1 occurred as a result of the premise, so we choose \"1\"..