A young child in a red shirt is chewing a stem of grass and there is a horse in the background.
A young boy in a red shirt chewing grass looks back at the horse.
Not every child is a boy. The fact that a young child is chewing a stem of grass with a horse in the background doesn't imply that the child looks back at the horse.
exists e1 p1 s1 s2 x1 x2 x3 x4 x5 x7.(n_background(x7) & exists x6.((x5 = x6) & in(x6,x7) & n_horse(x6)) & Theme(e1,x3) & Actor(e1,x1) & v_chew(e1) & of(x3,x4) & n_grass(x4) & n_stem(x3) & in(x1,x2) & n_shirt(x2) & a_red(s2) & Theme(s2,x2) & n_child(x1) & a_young(s1) & Theme(s1,x1))
exists e1 e2 s1 s2 s3 x1 x2 x3 x4 x5.(n_horse(x5) & a_back(s3) & Manner(e2,s3) & at(e2,x5) & Actor(e2,x1) & v_look(e2) & in(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_chew(e1) & n_grass(x4) & (x2 = x3) & n_shirt(x2) & a_red(s2) & Theme(s2,x2) & n_boy(x1) & a_young(s1) & Theme(s1,x1))