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 collapses to his knees, then falls face down on the floor.

SOLUTION: Someone yanks out a handful of green goo.

PROBLEM: His eyes widen as he comes to a decision.

SOLUTION: She sits down again, in the same position as before.

PROBLEM: Then he turns and starts to run.

SOLUTION:
Someone stands for a moment, confused, terrified.