Four men playing their instruments in the street while men and women onlookers stop.
The man play tag while the onlookers call the cops.
In sentence one the onlookers seem to be stopped to watch the men playing instruments. In sentence two the onlookers are calling the cops as a man plays tag. These could be two separate incidents or could be happening at the same time but the onlookers would be doing something or nothing.
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