TASK DEFINITION: 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.
PROBLEM: The girl wanted to wear earrings.
She got her ears pierced.

SOLUTION: effect

PROBLEM: My office door was open.
I overheard the conversation in the hall.

SOLUTION: effect

PROBLEM: The bolt tightened.
I twisted the wrench.

SOLUTION:
cause