TASK DEFINITION: In this task your given two statements in Chinese. You must judge whether the second sentence is the cause or effect of the first one. Label the instances as "cause" or "effect" based on your judgment. The sentences are separated by a newline character.
PROBLEM: 商店收银员叫保安。
顾客使用假币。

SOLUTION: cause

PROBLEM: 那女人心情不好。
她请她的朋友让她独自待着。

SOLUTION: effect

PROBLEM: 雪挡住了车道。
我把雪铲开了。

SOLUTION:
effect