City workers are doing maintenance on a train track.
A few workers graffiti a train car
Workers should not graffiti the train while they are doing maintenance on the track.
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 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_graffiti(e1) & n_car(x2) & of(x2,x3) & n_train(x3) & n_worker(x1) & a_few(s1) & Theme(s1,x1))