Anchor: you are you sure you didn't leave your refrigerator door open
Entailed: Are you certain you didn't leave your refrigerator door open?
Contradiction: Are you sure you didn't leave your car door open?
Contradiction: Czesiek did everything he could to keep kinky sites unavailable.
Contradiction: There are people on a soccer field.
Contradiction: Six people are playing a game of volleyball in the backyard.
Contradiction: Two people are in a martial arts competition.