Anchor: A young man working at a computer.
Entailed: a man is working
Contradiction: the man is asleep on his desk
Contradiction: This was a terrible winter with many blizzards. 
Contradiction: Economic studies have shown a relationship between observed ozone levels and crop yields.
Contradiction: People look angry while waiting in a butcher shop.
Contradiction: A girl is sitting on a pumpkin with flowers nearby.