A shirtless child is playing with a pink balloon on a sidewalk.
a kid with no shirt on os playing with a pink balloon outside
A shirtless kid and a kid with no shirt are the same thing.  If the kid is on a sidewalk then they are outside.
exists e1 s1 s2 x1 x2 x3.(with(e1,x2) & on(x2,x3) & n_sidewalk(x3) & n_balloon(x2) & a_pink(s2) & Theme(s2,x2) & Actor(e1,x1) & v_play(e1) & n_child(x1) & a_shirtless(s1) & Theme(s1,x1))
exists x1.(-exists e1 s1 x2 x3 x4 x5 x6.(a_topic(x1) & with(x1,x2) & on(x2,x3) & with(e1,x5) & n_outside(x5) & of(x5,x6) & n_balloon(x6) & a_pink(s1) & Theme(s1,x5) & Actor(e1,x4) & v_play(e1) & (x3 = x4) & n_os(x3) & n_shirt(x2)) & n_kid(x1))