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: I burst into a fit of laughter.
My eyes welled up with tears.

SOLUTION: effect

PROBLEM: I felt exhausted.
I studied all day.

SOLUTION: cause

PROBLEM: The man underwent emergency surgery.
He suffered a heart attack.

SOLUTION:
cause