A group of people walking on the train station.
A group of women walking on the train station.
A group of people doesn't mean that it is solely a group of women.
exists e1 x1 x2 x3 x4 x5.(n_station(x4) & of(x4,x5) & n_train(x5) & a_topic(x1) & of(x1,x2) & on(e1,x4) & Actor(e1,x3) & v_walk(e1) & (x2 = x3) & n_people(x2) & n_group(x1))
exists e1 x1 x2 x3 x4 x5.(n_station(x4) & of(x4,x5) & n_train(x5) & a_topic(x1) & of(x1,x2) & on(e1,x4) & Actor(e1,x3) & v_walk(e1) & (x2 = x3) & n_woman(x2) & n_group(x1))