Anchor: A man skateboards in a skate park while others skaters skate in the background.
Entailed: There are people skateboarding.
Contradiction: Men playing golf.
Contradiction: Well-chosen federal spending for infrastructure, education, and R&D halts productivity. 
Contradiction: A dog is brown.
Contradiction: Toddlers should be allowed to vote for president.
Contradiction: A document on the Release of Confidential information must be signed.