A little boy is sitting down reading a book.
A boy is reading a comic book.
A boy sitting down reading a book is not necessarily reading a comic book.
exists e1 e2 s1 s2 x1 x2.(for(e1,e2) & Theme(e2,x2) & Actor(e2,x1) & v_read(e2) & n_book(x2) & a_down(s2) & Manner(e1,s2) & Actor(e1,x1) & v_sit(e1) & n_boy(x1) & a_little(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_read(e1) & n_book(x2) & a_comic(s1) & Theme(s1,x2) & n_boy(x1))