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 movie tickets sold out.
It was opening day for the movie.

SOLUTION: cause

PROBLEM: I turned on the fan.
I felt cool air pass over me.

SOLUTION: effect

PROBLEM: The man cursed.
He stubbed his toe.

SOLUTION:
cause