Two groups of people sitting at a booth in a dinner.
People at dinner
People at dinner refers to  groups of people sitting at a booth in a dinner
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & of(x1,x2) & in(e1,x5) & n_dinner(x5) & at(e1,x4) & n_booth(x4) & Actor(e1,x3) & v_sit(e1) & (x2 = x3) & n_people(x2) & n_group(x1) & card_eq_2(x1))
exists x1 x2.(a_topic(x1) & at(x1,x2) & n_dinner(x2) & n_people(x1))