Two young people serve food.
Two people are serving steak.
People could serve any type of food. No evidence they were serving steak.
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_serve(e1) & n_food(x2) & n_people(x1) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_serve(e1) & n_steak(x2) & n_people(x1) & card_eq_2(x1))