An older man stands by a pile of trash.
the ugly dog eats cats
The subject is either an older man or an ugly dog.
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 e1 s1 x1 x2.(n_dog(x1) & a_ugly(s1) & Theme(s1,x1) & Theme(e1,x2) & Actor(e1,x1) & v_eat(e1) & n_cat(x2))