TASK DEFINITION: Given a sentence, generate a most likely context or previous statement. The previous statement should be relevant to the given statement.
PROBLEM: A boy rollerskate down the white railings as two other men walked up to him to give him high five.

SOLUTION: A person skateboard down to the ramp, a woman is shown in the phone's screen and then a man.

PROBLEM: Someone picks up a guitar.

SOLUTION: Later, he and someone stroll through the guitar section of a music store.

PROBLEM: He picks up a phone.

SOLUTION:
Someone's body lies on the sidewalk.