Two young boys are playing lacrosse.
the boys are on the couch
The boys cannot be playing lacrosse and sitting on the couch.
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_lacrosse(x2) & n_boy(x1) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1))
exists p1 x1 x2.(n_couch(x2) & n_boy(x1) & on(x1,x2))