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.

孩子的手很快退缩了。
他碰了热炉子。
cause

这个大学生想在校园里认识其他学生。
他加入了一个兄弟会。
effect

男孩捏了女孩的肘部。
她猛地把手臂从他身上拉开。

effect