Three window washers in blue uniforms work on scaffolding.
The window washers were cleaning the bird droppings off of a building.
The window washers aren't necessarily cleaning bird droppings.
exists e1 s1 x1 x2 x3 x4.(on(e1,x4) & n_scaffolding(x4) & Actor(e1,x1) & v_work(e1) & in(x1,x3) & n_uniform(x3) & a_blue(s1) & Theme(s1,x3) & n_washer(x1) & of(x1,x2) & n_window(x2) & card_eq_3(x1))
exists e1 x1 x2 x3 x4 x5.(n_droppings(x3) & of(x3,x4) & n_bird(x4) & n_washer(x1) & of(x1,x2) & n_window(x2) & of(e1,x5) & n_building(x5) & r_off(e1) & Theme(e1,x3) & Actor(e1,x1) & v_clean(e1))