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 smiles at catching someone enjoying someone.

SOLUTION: He even smiles somewhat secretly to himself at what he sees.

PROBLEM: Someone as he steps out of the water and hands him clap.

SOLUTION: Someone laughs and finishes someone's beer.

PROBLEM: Tears spill down someone's cheeks.

SOLUTION:
Someone stares at someone with disbelief.