A small boy is playing with rocks
Some kids are playing football
Either a boy, is playing or some kids, it cannot be both, also it is either rocks or a football that is being played with.
exists e1 s1 x1 x2.(with(e1,x2) & n_rock(x2) & Actor(e1,x1) & v_play(e1) & n_boy(x1) & a_small(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_football(x2) & n_kid(x1))