A young child, wearing a blue shirt and green hat, is blowing up an orange balloon.
The child is at a party.
Just because the child is wearing a hat and is blowing up a balloon does not mean that the child is at a party.  The child could be wearing the hat and blowing up the balloon in just about any location.
exists e1 e2 s1 s2 s3 s4 x1 x2 x3 x4 x5 x6.(for(e1,e2) & Theme(e2,x4) & Actor(e2,x1) & v_wear(e2) & n_hat(x6) & a_green(s4) & Theme(s4,x6) & n_shirt(x5) & a_blue(s3) & Theme(s3,x5) & subset_of(x6,x4) & subset_of(x5,x4) & a_up(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_blow(e1) & n_balloon(x2) & of(x2,x3) & n_orange(x3) & n_child(x1) & a_young(s1) & Theme(s1,x1))
exists p1 x1.(n_child(x1) & exists x2.(at(x1,x2) & n_party(x2)))