Anchor: Increasing the expertise of system administrators presented different challenges.
Entailed: It was hard to increase the knowledge of the system administrators .
Contradiction: It was easy to increase the knowledge of the administrators.
Contradiction: a man walking naked
Contradiction: Bar groups will recommend things to law school deans.
Contradiction: There is a boy crying because he has to do chores.
Contradiction: A tennis playing is trying to hit the ball.