Anchor: Rollerblades sliding on a railing.
Entailed: The rollerblades are by a railing.
Contradiction: Rollerblades are sliding on the concrete sidewalk.
Contradiction: The rollerblades are sliding on a sidewalk.
Contradiction: The rollerblades are sitting in a corner.
Contradiction: The sheep wearing rollerblades is skating.
Contradiction: no rollerblades