An older man reading a book while sitting on a boat.
The man is on a boat on the ocean.
Not all boats are on the ocean.
exists e2 e1 s1 x1 x2 x3 x4.(a_topic(x1) & while(e1,e2) & on(e2,x4) & n_boat(x4) & Actor(e2,x2) & v_sit(e2) & Theme(e1,x3) & Actor(e1,x2) & v_read(e1) & n_book(x3) & (x1 = x2) & n_man(x1) & r_more(s1) & a_older(s1) & Theme(s1,x1))
exists p1 x1 x3.(n_ocean(x3) & n_man(x1) & exists x2.(on(x1,x2) & on(x2,x3) & n_boat(x2)))