Anchor: Beginners who can stay afloat can learn to breathe through the tube and peer through the mask in minutes.
Entailed: If beginners can stay afloat, then they can learn to breathe through the tube and peer through the mask in minutes.
Contradiction: Beginners can nevere stay afloat, it's impossible.
Contradiction: Their claims do not include violations of recruitment promises.
Contradiction: Two racers are turning during a race.
Contradiction: An old man sits on grass.
Contradiction: What is going on?