A naked person standing on a rock.
A fully clothed person stands on the floor.
A person cannot be both naked and clothed at the same time.
exists e1 s1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_rock(x3) & Actor(e1,x2) & v_stand(e1) & (x1 = x2) & n_person(x1) & a_naked(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(n_floor(x3) & a_topic(x1) & on(x1,x3) & n_stand(x1) & of(x1,x2) & n_person(x2) & Theme(e1,x1) & v_clothe(e1) & r_fully(x1))