A man hang glides over the countryside.
a guy is hang gliding on christmas
A man hang gliding  over the countryside doesn't mean that the man is hang gliding on christmas.
exists x1 x2 x3 x4.(n_countryside(x4) & a_topic(x1) & over(x1,x4) & n_glide(x1) & of(x1,x3) & n_hang(x3) & of(x1,x2) & n_man(x2))
exists e1 p1 x1.(exists e2 x2.(on(e2,x2) & n_christmas(x2) & Actor(e2,x1) & v_glide(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_hang(e1) & n_guy(x1))