A young girl concentrating on a game of checkers.
The girl is playing her grandfather.
A girl playing checkers does not have to be doing so with her grandfather.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x3) & of(x3,x4) & n_checkers(x4) & n_game(x3) & Actor(e1,x2) & v_concentrate(e1) & (x1 = x2) & n_girl(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_grandfather(x2) & of(x2,x1) & n_female(x1) & n_girl(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1))