Anchor: People walking on the side of the road during a snowy day.
Entailed: People are walking along a road.
Contradiction: Two people are throwing paper airplanes at each other in class.\
Contradiction: I needed to remember where I put my keys. 
Contradiction: I want to know if you noticed candle grease on the floor yesterday.
Contradiction: Self administered alcoholism screening cannot be compared to computer administered screenings.
Contradiction: A human playing