Anchor: The crowds of people fill the streets in town as they converse with each other.
Entailed: Crowds of people converse.
Contradiction: Crowds of people take a dump in the streets.
Contradiction: The picture only shows policemen.
Contradiction: People are standing around.
Contradiction: I know how to get rid of them.
Contradiction: A multipollutant control scenario would reduce emissions of other pollutants.