City working performing maintenance on public transportation.
City has public transportation
The city can only perform maintenance on public transportation if it has one.
exists e1 e2 s1 x1 x2 x3.(ne_geo_city(x1) & for(e1,e2) & Theme(e2,x2) & Actor(e2,x1) & v_perform(e2) & on(x2,x3) & n_transportation(x3) & a_public(s1) & Theme(s1,x3) & n_maintenance(x2) & Actor(e1,x1) & v_work(e1))
exists e1 s1 x1 x2.(ne_geo_city(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_transportation(x2) & a_public(s1) & Theme(s1,x2))