a little child reaches for a bar.
Nobody is reaching.
Either a little child is reaching, or nobody is.
exists e1 s1 x1 x2.(for(e1,x2) & n_bar(x2) & Actor(e1,x1) & v_reach(e1) & n_child(x1) & a_little(s1) & Theme(s1,x1))
-exists e1 x1.(Actor(e1,x1) & v_reach(e1) & n_person(x1))