TASK DEFINITION: Given a sentence, generate a most likely context or previous statement. The previous statement should be relevant to the given statement.
PROBLEM: Trembling, he stares at it then collapses safely.

SOLUTION: Someone's mouth drops as he thinks to himself.

PROBLEM: Only to retreat as colossal spiders appear scrambling over the rubble.

SOLUTION: The giant's weapon, strikes the bell.

PROBLEM: A man is sitting behind a drum set on a stage above him.

SOLUTION:
His fingers are shown playing the bag pipes.