Two adults are working on a piece of wood
Two adults are working with wood.
Working on wood and working with wood have the same meaning.
exists e1 x1 x2 x3.(on(e1,x2) & of(x2,x3) & n_wood(x3) & n_piece(x2) & Actor(e1,x1) & v_work(e1) & n_adult(x1) & card_eq_2(x1))
exists e1 x1 x2.(with(e1,x2) & n_wood(x2) & Actor(e1,x1) & v_work(e1) & n_adult(x1) & card_eq_2(x1))