Anchor: A person is sleeping under a table covered in a yellow blanket.
Entailed: Someone is asleep.
Contradiction: A cat is drinking milk.
Contradiction: A girl, dressed in a baseball uniform, is getting ready to throw a green soccer ball
Contradiction: Requiring signed statements serves as a useful technique for getting users to understand the importance of organizational policies. 
Contradiction: My friends who don't vote are uneducated.
Contradiction: A man is skateboarding up a ramp.