Anchor:  He bent to the floor, searching until he found a ball of the sky material that had been pinched off when the little opening was sealed.
Entailed: The ball of sky material that he found had been pinched off when the small opening was sealed. 
Contradiction: He stood up and failed to find any bit of sky material. 
Contradiction: A girl runs away from her mother.
Contradiction: A parametric analysis is a type of cost study.
Contradiction: A basketball player has the ball in his hand
Contradiction: A teen shows off some new tricks over a set of stairs.