TASK DEFINITION: Given a sentence, generate a most likely context or previous statement. The previous statement should be relevant to the given statement.
PROBLEM: He keeps the ad, and looks at it with a sober expression.

SOLUTION: It's the attachment someone forwarded to all employees.

PROBLEM: He tries the door at the far end 

SOLUTION: Back at his house someone ventures down a brief corridor.

PROBLEM: two men are standing on a court.

SOLUTION:
A crowd is gathered in a gym.