Anchor: In preliminary studies, for example, the questions can show if Prozac is working or not.
Entailed: In preliminary surveys, the questions can show whether or not Prozac is doing its job. 
Contradiction: The questions can show whether or not the donkey is riding the train to work. 
Contradiction: A rollerblader races on an indoor track.
Contradiction: She met Nancy Mintie there. 
Contradiction: The swords look liked tigers in attack.
Contradiction: Three women with a banner.