Anchor: Walls of openwork stone tracery support a canopy of 18 folds fanning out in a circle.
Entailed: In a round fashion do 18 folds of a canopy of stone tracery.
Contradiction: 17 folds make up a canopy of stone tracing.
Contradiction: A man poses with a gun.
Contradiction: dogs run in snow
Contradiction: He wore plastic spurs. 
Contradiction: On the other hand, you might enjoy using secondary roads to discover the country.