A group of people on a dock by a city boarding various boats
there are people in the street boarding a train at the train station.
The people are either at a dock or a train station, not both
exists e1 s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & Theme(e1,x6) & Actor(e1,x5) & v_board(e1) & n_boat(x6) & a_various(s1) & Theme(s1,x6) & (x1 = x5) & on(x1,x3) & by(x3,x4) & n_city(x4) & n_dock(x3) & of(x1,x2) & n_people(x2) & n_group(x1))
exists p1 x1 x3.(n_street(x3) & exists e1 x2 x4 x5 x6.((x1 = x2) & at(e1,x6) & n_station(x6) & of(x6,x5) & n_train(x5) & n_train(x5) & Theme(e1,x5) & Actor(e1,x4) & v_board(e1) & (x2 = x4) & in(x2,x3) & n_people(x2)))