City workers are doing maintenance on a train track.
People are standing near train tracks.
Workers are people and they are doing maintenance by standing near the tracks
exists e1 x1 x2 x3 x4 x5.(on(e1,x4) & n_track(x4) & of(x4,x5) & n_train(x5) & Theme(e1,x3) & Actor(e1,x1) & v_do(e1) & n_maintenance(x3) & n_worker(x1) & (x1 = x2) & ne_geo_city(x2))
exists e1 x1 x2 x3.(near(e1,x2) & n_track(x2) & of(x2,x3) & n_train(x3) & Actor(e1,x1) & v_stand(e1) & n_people(x1))