A city street is being cleaned by a man in a green vehicle.
A man is driving a blue vehicle
The vehicle can either be blue or green. The man is either cleaning or driving.
exists e1 s1 x1 x2 x3 x4.(Actor(e1,x3) & in(x3,x4) & n_vehicle(x4) & a_green(s1) & Theme(s1,x4) & n_man(x3) & Theme(e1,x1) & v_clean(e1) & n_street(x1) & of(x1,x2) & n_city(x2))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_drive(e1) & n_vehicle(x2) & a_blue(s1) & Theme(s1,x2) & n_man(x1))