Anchor: A kid in a white T-shirt doing a stunt on a skateboard while another kid in an orange shirt also on a skateboard looks on.
Entailed: A kid and his friend skateboard together.
Contradiction: Two kids sit in the classroom.
Contradiction: Research shows that an estimated 51 percent of non-COPD premature deaths avoided come from people under the age of 45. 
Contradiction: By the time I bought a present, my friend got divorced and engaged again.
Contradiction: A man is lying down.
Contradiction: I want concise verbal communication.