Anchor: A man performing stunts on a snowboard.
Entailed: A man is performing stunts while on a snowboard.
Contradiction: Many people are protesting in a street.
Contradiction: I'm certain neither Pink Floyd nor Catullus said this.
Contradiction: Jails are crowded, so sometimes criminals are released before their paperwork is finished.
Contradiction: Number 21 is sliding into first base.
Contradiction: A bunch of people are at a train station.