Artists working on a mosaic on the ground.
dogs working on a mosaic
Artists are not dogs.
exists e1 x1 x2 x3.(n_ground(x3) & on(e1,x3) & on(e1,x2) & n_mosaic(x2) & Actor(e1,x1) & v_work(e1) & n_artist(x1))
exists e1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_mosaic(x3) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_dog(x1))