Anchor: A female athlete wearing white is warming up by stretching.
Entailed: An athlete in white is stretching.
Contradiction: A girl in black is stretching alone on the field.
Contradiction: A man angry about the weather.
Contradiction: The United States must have presidents with good conduct to set an example for all other countries. 
Contradiction: A homeless woman is eating a hamburger.
Contradiction: Out of requirement and system component, one must be able to work.