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 suddenly turns round.

SOLUTION: Inside, someone Johnson looks up and sees him.

PROBLEM: Someone looks on helplessly as huge glass shards rain down on frightened pedestrians.

SOLUTION: Windows shatter in the buildings around them.

PROBLEM: The dog walks onto the big platform as the man first pushes the mower back and forth.

SOLUTION:
He is basically walking her, while the owner walks a third dog.