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 watches serenely, as he leans closer.

SOLUTION: Someone sits down in a nearby armchair.

PROBLEM: An emergency rescue vehicle sits a a gas pump.

SOLUTION: A group of workers use hand towels to wash the exterior of a car at the gas station.

PROBLEM: He sits up and blinks several times.

SOLUTION:
His sweaty head sags against his chest.