An older man stands by a pile of trash.
the old guy is by trash
"is by trash" is a rephrasing of "stands by a trash".
exists s1 x1 x2 x3 x4.(a_topic(x1) & by(x1,x3) & of(x3,x4) & n_trash(x4) & n_pile(x3) & n_stand(x1) & of(x1,x2) & n_man(x2) & r_more(s1) & a_older(s1) & Theme(s1,x1))
exists p1 s1 x1.(n_guy(x1) & a_old(s1) & Theme(s1,x1) & exists x2.(by(x1,x2) & n_trash(x2)))