People are standing on a train platform waiting for the train.
People are leaving for vacation on a train.
Answer :Just because people are waiting for the train does not mean that they are leaving for vacation on a train
exists e1 e2 x1 x2 x3.(for(e1,e2) & for(e2,x3) & n_train(x3) & n_train(x3) & Actor(e2,x1) & v_wait(e2) & on(e1,x2) & n_platform(x2) & of(x2,x3) & Actor(e1,x1) & v_stand(e1) & n_people(x1))
exists e1 x1 x2 x3.(on(e1,x3) & n_train(x3) & for(e1,x2) & n_vacation(x2) & Actor(e1,x1) & v_leave(e1) & n_people(x1))