Two people wait in a train station.
Two people were waiting for the train.
If two people were waiting for a train then at one point in time they actively had to wait in a train station.
exists e1 x1 x2 x3.(in(e1,x2) & n_station(x2) & of(x2,x3) & n_train(x3) & Actor(e1,x1) & v_wait(e1) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_train(x2) & for(e1,x2) & Actor(e1,x1) & v_wait(e1) & n_people(x1) & card_eq_2(x1))