Anchor: A Yankees fan sits at a computer with headphones on.
Entailed: A sports fan sitting at a computer with headphones on.
Contradiction: A booger sitting at a computer with headphones on.
Contradiction: I would never recommend the Boy Scouts to anyone. 
Contradiction: There's a group of people walking down a hallway.
Contradiction: 2 people are walking on a country path.
Contradiction: Fishing is enjoyable here.