Anchor: A man with a hat walks along train tracks.
Entailed: A person is following tracks.
Contradiction: Train tracks are completely isolated and unpopulated.
Contradiction: a scene does not have any trains in it
Contradiction: There are people clapping around a man dressed in black
Contradiction: We're ashamed of Jessie Helms. 
Contradiction: The Health Effects Institute discovered a statistical issue with short-term ozone mortality risk assessment.