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 strolls up to the bar and leans her back against it.

SOLUTION: As she leaves, someone's lips curl into a smile.

PROBLEM: They go down the white waters with their paddles.

SOLUTION: A group of kayakers are gathered at a rapid river.

PROBLEM: Someone's eyes widen and he starts to run forward.

SOLUTION:
Someone starts to go then pauses in the doorway.