Some people sitting inside a running train.
The moving train has stopped at the station.
The train is not necessarily stopped at the station.
exists e1 e2 x1 x2 x3.(a_topic(x1) & inside(e1,x3) & n_train(x3) & Actor(e2,x3) & v_run(e2) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_people(x1))
exists e1 e2 x1 x2.(n_station(x2) & n_train(x1) & Actor(e1,x1) & v_move(e1) & at(e2,x2) & Actor(e2,x1) & v_stop(e2))