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.

Q: The woman sighed with frustration.
Her husband misunderstood her concerns.

A: cause
****
Q: The lock opened.
I turned the key in the lock.

A: cause
****
Q: I looked forward to the weekend.
I planned to attend my friend's wedding.

A:
cause
****