A group of people are waiting at a subway station.
People are waiting for the next train.
Just because people are waiting at a subway station it does not mean they are waiting for the next train.
exists e1 x1 x2 x3 x4.(at(e1,x3) & n_station(x3) & of(x3,x4) & n_subway(x4) & Actor(e1,x1) & v_wait(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 s1 x1 x2.(n_train(x2) & a_next(s1) & Theme(s1,x2) & for(e1,x2) & Actor(e1,x1) & v_wait(e1) & n_people(x1))