An artist paints a mural onto a building.
An artist is painting a stop sign.
Mural and stop sign are two different things to paint by an artist.
exists e1 x1 x2 x3.(onto(e1,x3) & n_building(x3) & Theme(e1,x2) & Actor(e1,x1) & v_paint(e1) & n_mural(x2) & n_artist(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_paint(e1) & n_sign(x2) & of(x2,x3) & n_stop(x3) & n_artist(x1))