Anchor: A boy in a yellow shirt is walking on a beach holding a surfboard.
Entailed: A boy is walking on a beach with a surfboard.
Contradiction: A boy is walking on a beach with a kite.
Contradiction: No one likes the way breasts look or feel in a bra. 
Contradiction: The musicians are preparing for their performance.
Contradiction: A street is insignificant. 
Contradiction: Jon asked Ca'daan where Susan was.