Anchor: A group of young people sitting in the grass as one plays a guitar and another the violin.
Entailed: Someone is playing a guitar, while someone else plays a violin.
Contradiction: Someone is playing the saxophone.
Contradiction: A slug slimes an apple.
Contradiction: A group of young people sit in the grass and listen to the radio.
Contradiction: The group of youn people are inside a building.
Contradiction: The young people are playing flag-football on the muddy field in the rain.