Given a sentence, generate a most likely context or previous statement. The previous statement should be relevant to the given statement.
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Question: People drop what they are doing and flee.

Answer: The train passes by revealing a crowd of men wielding clubs, knives, and axes running towards them.

Question: He watches someone with a warm grin.

Answer: Someone looks at him, then at her hand.

Question: On a monitor next to her, someone watches moving patches of light and dark take on a recognizable shape.

Answer:
A technician spreads gel across someone's distended belly with an ultrasound scan head.