A large group of people waiting at a train station.
A group of people waiting for the next train to New York City.
A group does not have to be large.  People do not have to be waiting for the next train to New York City because they are at a train station.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & of(x1,x2) & at(e1,x4) & n_station(x4) & of(x4,x5) & n_train(x5) & Actor(e1,x3) & v_wait(e1) & (x2 = x3) & n_people(x2) & n_group(x1) & a_large(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3 x4 x5 x6 x7.(ne_geo_city(x5) & (x5 = x7) & ne_geo_york(x7) & (x5 = x6) & ne_geo_new(x6) & n_train(x4) & a_next(s1) & Theme(s1,x4) & a_topic(x1) & of(x1,x2) & for(e1,x4) & to(x4,x5) & Actor(e1,x3) & v_wait(e1) & (x2 = x3) & n_people(x2) & n_group(x1))