A man windsurfing in the ocean.
A man is an experienced windsurfer.
Just because he is windsurfing does not necessarily mean he is experienced.
exists x1 x2 x3.(n_ocean(x3) & a_topic(x1) & in(x1,x3) & n_windsurfing(x1) & of(x1,x2) & n_man(x2))
exists p1 x1.(exists s1 x2.((x1 = x2) & n_windsurfer(x2) & a_experienced(s1) & Theme(s1,x2)) & n_man(x1))