A man hang glides over the countryside.
The hang glider is purple.
A man hang gliding over the countryside doesn't mean that the hang glider is purple.
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 s1 x1 x2.(n_glider(x1) & of(x1,x2) & n_hang(x2) & Theme(s1,x1) & a_purple(s1))