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.

我丢弃了那张纸条。
这是难以辨认的。
cause

那人向苍蝇用力击打。
苍蝇嗡嗡飞走。
effect

这男人目睹了外星人。
他那时出现了幻觉。

cause