One of the buses is marked "Linea Express" while the other is marked "Metropolitan Transit System". 
The buses are competing with each other.
Not all buses are competing.
exists e1 p1 x1 x2 x3 x4 x5 x6 x7 x8.(ne_org_system(x6) & (x6 = x8) & ne_org_transit(x8) & (x6 = x7) & ne_org_metropolitan(x7) & n_other(x5) & ne_geo_express(x3) & (x3 = x4) & ne_geo_linea(x4) & n_bus(x2) & exists e2.(Recipient(e2,x6) & Theme(e2,x5) & v_mark(e2)) & while(e1,p1) & Recipient(e1,x3) & Theme(e1,x1) & v_mark(e1) & of(x1,x2) & n_thing(x1) & card_eq_1(x1))
exists e1 x1.(n_bus(x1) & all x2.(n_other(x2) -> with(e1,x2)) & Actor(e1,x1) & v_compete(e1))