A man is standing on a ladder painting bricks
A man is cleaning bricks.
Painting and cleaning the bricks cannot be done simultaneously.
exists e1 x1 x2 x3 x4.(Time(e1,x4) & n_brick(x4) & on(e1,x2) & n_painting(x2) & of(x2,x3) & n_ladder(x3) & Actor(e1,x1) & v_stand(e1) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_clean(e1) & n_brick(x2) & n_man(x1))