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.

The pen ran out of ink.
I used a pencil.
effect

The cashier opened the cash register.
The customer handed her money.
cause

The woman had an infection.
She took antibiotics.

effect