A sculpture works on one of his pieces.
A person is working on making dinner.
One cannot be working on an art piece while making dinner.
exists e1 x1 x2 x3.(on(e1,x2) & of(x2,x3) & n_piece(x3) & of(x3,x1) & n_male(x1) & n_thing(x2) & card_eq_1(x2) & Actor(e1,x1) & v_work(e1) & n_sculpture(x1))
exists e2 e1 x1 x2 x3.(on(e1,e2) & Theme(e2,x3) & Actor(e2,x2) & v_make(e2) & n_dinner(x3) & Actor(e1,x1) & v_work(e1) & n_person(x1))