Children of elementary school age walk along a sidewalk.
The children lay in the grass and count the stars.
Children who lie on the grass cannot be walking.
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 e1 x1 x2 x3 x4 x5.(n_count(x5) & n_grass(x4) & subset_of(x5,x3) & subset_of(x4,x3) & n_star(x2) & n_child(x1) & in(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_lay(e1))