People waiting at a subway station.
people are waiting for a train
It cannot be inferred that the people are waiting at the station for a train.
exists e1 x1 x2 x3 x4.(a_topic(x1) & at(e1,x3) & n_station(x3) & of(x3,x4) & n_subway(x4) & Actor(e1,x2) & v_wait(e1) & (x1 = x2) & n_people(x1))
exists e1 x1 x2.(for(e1,x2) & n_train(x2) & Actor(e1,x1) & v_wait(e1) & n_people(x1))