Anchor: I need to be home before eight, my wife has a yoga class tonight.'
Entailed: I have to be home prior to eight so my wife can head to yoga.
Contradiction: I do not have to be home by ten since my wife does not have yoga tonight.
Contradiction: Only girls are in the room.
Contradiction: A dog is running around a field.
Contradiction: A child is sleeping.
Contradiction: A race car driver is talking to two guys who are leaning on his car.