Anchor: Four people sit around a campfire and the sky is blue behind them.
Entailed: The people are by the fire.
Contradiction: The people are sitting in the dark.
Contradiction: The tour does not pass through the city centre, but it does pass by a wonderful blue pool. 
Contradiction: A singer is performing.
Contradiction: Men are sleeping on a sailboat.
Contradiction: Tuppence drew her a course of action.