TASK DEFINITION: Given a sentence, generate a most likely context or previous statement. The previous statement should be relevant to the given statement.
PROBLEM: Smiling calmly, someone heads into the house.

SOLUTION: Someone stands and faces him with a nonchalant wave.

PROBLEM: Later, his board rests on a chair outside as he comes in.

SOLUTION: At an isolated nighttime beach, someone crouches over his surfboard and waxes it aggressively.

PROBLEM: He pops up and shakes out his curls.

SOLUTION:
Someone stops paddling then rolls off his board and into the water.