Anchor: Patriotic band is playing music for onlookers.
Entailed: A band is playing music for onlookers.
Contradiction: A band is cooking for onlookers.
Contradiction: The skateboarder has two broken legs.
Contradiction: In 44 b.c. he was 
Contradiction: The horse stands in a stable.
Contradiction: Evolving logic of observation, education and other studies