In this task your given two statements. 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.

I changed the topic of conversation.
The conversation became tense.
cause

The man became annoyed with his friend.
His friend interrupted him.
cause

I hung up the phone.
The caller said goodbye to me.

cause