Anchor: A man is sitting in a semi truck smiling.
Entailed: A man is sitting in a truck.
Contradiction: A boy is studying in the library.
Contradiction: You can't really change anything.
Contradiction: WOMAN LOOKS DOWN WITH A CAMERA
Contradiction: Residual chlorine should always exceed 0.01 mg/L after dechlorination. 
Contradiction: A vendor is selling beads.