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.

这个男孩发脾气。
他的兄弟拿走了他的玩具。
cause

蒸汽从锅上升出。
水煮沸了。
cause

螺栓被拧紧了。
我扭动了扳手。

cause