Anchor: A women's roller derby team is skating around the rink.
Entailed: There is more than one person in the rink
Contradiction: There is one person at the rink
Contradiction: That doesn't work at all.
Contradiction: The Hall of Public Audience is rumored to have ghosts of nobles and commoners.
Contradiction: An artist paints the park and sells it for $100.
Contradiction: Get straight, old man.