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 touches a girder someone holds between them.

SOLUTION: Someone rises from the floor and sends metal beams crashing through the chamber between them.

PROBLEM: A horse tips over backward with a a person on it.

SOLUTION: A man riding a horse gets bucked off.

PROBLEM: Someone shakes the head and says nothing.

SOLUTION:
Someone, staring at him, still does not answer.