Two young people serve food.
People enjoying eating their homemade lunch.
You can't serve food at the same time while your eating it.
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.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_eat(e1) & n_lunch(x3) & of(x3,x4) & n_homemade(x4) & of(x3,x1) & n_thing(x1) & (x1 = x2) & n_people(x1))