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 man remained silent when his friend finishing speaking.
He was thinking about his friend's words.

SOLUTION: cause

PROBLEM: The detective flashed his badge to the police officer.
The police officer let the detective enter the crime scene.

SOLUTION: effect

PROBLEM: The journalist wrote a biography about the humanitarian's life.
The journalist was intrigued by the humanitarian's work.

SOLUTION:
cause