Anchor: a skateboarding ramp located in a room with multicolored graffti painted on the wall.
Entailed: There is a skateboarding ramp in a bright room.
Contradiction: There is a skateboarding ramp in a room with black walls.
Contradiction: There are 23 prisoners who were in police custody and wound up being tortured to death within the last 3 years. 
Contradiction: I refuse to believe it.
Contradiction: I do not find it worth going after.
Contradiction: A worker is cleaning.