a young boy and girl playing a video game.
The two brothers are eating pizza.
A boy and a girl are brother and sister vice two brothers.
exists e1 s1 s2 x1 x2 x3 x4 x5.(a_topic(s1) & Theme(e1,x4) & Actor(e1,x3) & v_play(e1) & n_game(x4) & of(x4,x5) & n_video(x5) & (s1 = x3) & n_girl(x2) & n_boy(x1) & subset_of(x2,s1) & subset_of(x1,s1) & a_young(s2) & Theme(s2,s1))
exists e1 x1 x2.(n_brother(x1) & card_eq_2(x1) & Theme(e1,x2) & Actor(e1,x1) & v_eat(e1) & n_pizza(x2))