A man on a couch reading a book.
A man reading a book.
"On a couch" is to tell the location. The main point is that a man reading the book.
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_read(e1) & n_book(x4) & (x2 = x3) & n_couch(x2) & n_man(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_read(e1) & n_book(x3) & (x1 = x2) & n_man(x1))