Anchor: The tennis player wears a headband to protect his eyes from sweat.
Entailed: The tennis player uses a headband to protect himself from his sweat
Contradiction: The tennis player is female.
Contradiction: The train is leaving the station
Contradiction: The tennis player has split his shorts.
Contradiction: The basketball player wears a sweatband to keep the sweat out of his eyes.
Contradiction: The tennis player is not hot.