A young girl playing on a log swing.
a man falls off a swing
An young is not a man.  They still can't be playing if they fall off the swing.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x3) & n_swing(x3) & of(x3,x4) & n_log(x4) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_girl(x1) & a_young(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(a_off(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_fall(e1) & n_swing(x2) & n_man(x1))