Two people ride the train.
The people are riding in a car
Car and train are different.
exists e1 x1 x2.(n_train(x2) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_people(x1) & in(e1,x2) & n_car(x2) & Actor(e1,x1) & v_ride(e1))