Two young people serve food.
A boy and a girl are serving food in a restaurant.
Two young people are not necessarily a boy and a girl. Could be two girls. Serve food does not always mean in a restaurant. Food is served at home too.
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 x3 x4 x5.(in(e1,x5) & n_restaurant(x5) & Theme(e1,x4) & Actor(e1,x1) & v_serve(e1) & n_food(x4) & subset_of(x3,x1) & n_girl(x3) & subset_of(x2,x1) & n_boy(x2))