TASK DEFINITION: Given a sentence, generate a most likely context or previous statement. The previous statement should be relevant to the given statement.
PROBLEM: Someone stands beside him holding a gun to his cheek.

SOLUTION: Now alone, the thin gunman peers around his pillar at the mezzanine.

PROBLEM: the man is in the room making exercise and showing the machine.

SOLUTION: Two men are in a lake in a canoe.

PROBLEM: Someone stops in the end zone.

SOLUTION:
As someone casually opens a menu, his son trudges over.