Anchor: A group of extreme skiers trudging up a saddle in high alpine terrain.
Entailed: A group of people are walking.
Contradiction: Some people are at the beach.
Contradiction: A couple waking up in the morning.
Contradiction: Attendance at conferences was the reason why this was accomplished.
Contradiction: He was able to make another attempt before a messenger arrived with an order. 
Contradiction: A men have a shirt that have 13 on the  back.