A small dog is playing with a plastic bag on the sidewalk.
Nothing is playing
A small dog is either playing with a plastic bag or nothing is playing.
exists e1 s1 s2 x1 x2 x3.(n_sidewalk(x3) & with(e1,x2) & on(x2,x3) & n_bag(x2) & a_plastic(s2) & Theme(s2,x2) & Actor(e1,x1) & v_play(e1) & n_dog(x1) & a_small(s1) & Theme(s1,x1))
-exists e1 x1.(Actor(e1,x1) & v_play(e1) & n_thing(x1))