A man is wind sailing in the ocean.
The man is wind sailing with other people.
Not all wind sailing is done with other people.
exists p1 x1 x4.(n_ocean(x4) & exists x2 x3.((x1 = x2) & in(x2,x4) & n_sailing(x2) & of(x2,x3) & n_wind(x3)) & n_man(x1))
exists p1 x1 x5.(n_people(x5) & n_man(x1) & exists x2 x3 x4.((x1 = x2) & with(x2,x4) & -(x4 = x5) & n_people(x4) & n_sailing(x2) & of(x2,x3) & n_wind(x3)))