A quarterback hands off the football to a running back.
Men are playing football.
A quarterback and a running back are men.
exists s1 x1 x2 x3 x4 x5.(n_football(x3) & a_topic(x1) & off(x1,x3) & to(x3,x4) & Theme(s1,x5) & a_back(s1) & (x4 = x5) & n_run(x4) & n_hand(x1) & of(x1,x2) & n_quarterback(x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_football(x2) & n_man(x1))