Children of elementary school age walk along a sidewalk.
The children are young kids.
Children of elementary school age are young kids.
exists e1 s1 x1 x2 x3 x4.(along(e1,x4) & n_sidewalk(x4) & Theme(e1,x1) & v_walk(e1) & of(x1,x2) & n_age(x2) & of(x2,x3) & n_school(x3) & a_elementary(s1) & Theme(s1,x2) & n_child(x1))
exists p1 x1.(n_child(x1) & exists s1 x2.((x1 = x2) & n_kid(x2) & a_young(s1) & Theme(s1,x2)))