TASK DEFINITION: Given a sentence, generate a most likely context or previous statement. The previous statement should be relevant to the given statement.
PROBLEM: She empties his drink into one empty glass.

SOLUTION: Someone empties his glass and slaps it on the shelf next to someone.

PROBLEM: The man in the black suit spikes the ping pong ball and celebrates.

SOLUTION: Two men are playing ping pong together, one guy is wearing a black suit, the guy in the black suit has a unique style.

PROBLEM: Someone sets down his champagne flute and presents a small tray to his son.

SOLUTION:
At the Crimson Elephant, someone and someone's families toast.