Two young people serve food.
Two friends work together at a diner.
No evidence these young people are friends or that they are working in a diner. Not all young people are friends.
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 s1 x1 x2.(at(e1,x2) & n_diner(x2) & a_together(s1) & Manner(e1,s1) & Actor(e1,x1) & v_work(e1) & n_friend(x1) & card_eq_2(x1))