Three people are waiting on a train platform.
The people are waiting for a train.
Three people may be more vaguely described as people. People usually wait for a train on a train platform.
exists e1 x1 x2 x3.(on(e1,x2) & n_platform(x2) & of(x2,x3) & n_train(x3) & Actor(e1,x1) & v_wait(e1) & n_people(x1) & card_eq_3(x1))
exists e1 x1 x2.(n_people(x1) & for(e1,x2) & n_train(x2) & Actor(e1,x1) & v_wait(e1))