Anchor: Several people are walking while wearing coats, while one is riding a bike.
Entailed: People are walking.
Contradiction: Macbeth wore a zoot suit.
Contradiction: Hastings and I had no conversation.
Contradiction: He changed the atmosphere at court with a flair for the extravagant.
Contradiction: Gay men are needed for making the question . 
Contradiction: When I bought it it was white and I have been painting it white.