TASK DEFINITION: Given a sentence, generate a most likely context or previous statement. The previous statement should be relevant to the given statement.
PROBLEM: People drop what they are doing and flee.

SOLUTION: The train passes by revealing a crowd of men wielding clubs, knives, and axes running towards them.

PROBLEM: Someone suddenly turns round.

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

PROBLEM: Someone sits, watching him.

SOLUTION:
Someone sits back down in his chair.