Anchor: Several people sit on a train.
Entailed: The people are on a vehicle.
Contradiction: The people are sitting in a car.
Contradiction: In the Figure 20, Projected Marginal Cost of SO2 Reductions ($/Time)
Contradiction: I  began to drift somewhere else. 
Contradiction: But, they can't agree that slaves were ever happy, due to their condition as slaves.
Contradiction: Two people are outdoors.