Anchor: A big dog sniffs a little dog.
Entailed: A big dog is sniffing.
Contradiction: The little dog sniffs the big dog.
Contradiction: The family is at the near by lake enjoying the day.
Contradiction: Detection activities find improper payments.
Contradiction: The difference in cost depends upon the volume only. 
Contradiction: People should feel lucky to have kids even if they don't have new possessions.