Anchor: A black dog is poised to catch a Frisbee.
Entailed: A black dog is ready to catch a frisbee.
Contradiction: A cat is ready to kill a spider.
Contradiction: The birthday party you organized was for a cousin. 
Contradiction: bill volume declined between the years 1990 and 1997
Contradiction: A blue truck is being towed.
Contradiction: A person getting a picture taken.