Anchor: A big black dog bares its teeth while running through the snow.
Entailed: A big black dog bares its teeth
Contradiction: A big black dog not baring its teeth
Contradiction: 7. Basic Financial Data and Kohler's Dictionary for Lawyers
Contradiction: A guitarist is performing for a small audience.
Contradiction: One man is riding a bike in the city.
Contradiction: A man is riding a bike.