TASK DEFINITION: Given a sentence, generate a most likely context or previous statement. The previous statement should be relevant to the given statement.
PROBLEM: We see him take a drink from a bottle.

SOLUTION: Someone goes on to get his apron from behind the fountain.

PROBLEM: The moon hangs low, casting long shadows.

SOLUTION: The night is whirring and breathing, alive.

PROBLEM: They notice every student around them wearing their backpacks strapped to both shoulders.

SOLUTION:
In slow motion the undercover cops get out and sling their backpacks over one shoulder.