Anchor: A man on a bicycle is on only the back wheel.
Entailed: A man is riding his bike.
Contradiction: A woman is on a bicycle.
Contradiction: Jim was not present in the weekly meetings.
Contradiction: A woman jumping in front of a flower bush.
Contradiction: At first, I loved the scent of eucalyptus but now I hate it.  
Contradiction: Malamud's editor published a Complete Stories.