Anchor: Two guys having fun playing and singing a song.
Entailed: The guys here are actively interacting with each other.
Contradiction: Everyone who is here is currently being very quiet.
Contradiction: A surfer is wearing a yellow suit and riding waves of snow.
Contradiction: A person is drawing something.
Contradiction: Costs incurred by labor through the system are included among the regular costs.
Contradiction: These people are outside.