TASK DEFINITION: Given a sentence, generate a most likely context or previous statement. The previous statement should be relevant to the given statement.
PROBLEM: The child is sliding down the slide opening.

SOLUTION: The man is sitting down.

PROBLEM: He begins performing tricks with the dog using a frisbee.

SOLUTION: A man is seen standing in a large field next to a dog.

PROBLEM: He moves into the oncoming lane and pulls up beside the van.

SOLUTION:
Someone comes up on the van.