Two young boys practice Kick-boxing.
A girl kicks a boy in the face.
boys  is not the same as girl
exists s1 s2 x1 x2 x3.(n_kick-boxing(x1) & of(x1,x3) & n_practice(x3) & of(x1,x2) & n_boy(x2) & a_.(s2) & Theme(s2,x1) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1) & a_topic(x1))
exists e1 x1 x2 x3.(n_face(x3) & in(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_kick(e1) & n_boy(x2) & n_girl(x1))