A parasurfer is airborne over the water.
A woman in a bikini is parasurfing.
Not every parasurfer is a woman in a bikini.
exists s1 x1 x2.(n_water(x2) & over(s1,x2) & Theme(s1,x1) & a_airborne(s1) & n_parasurfer(x1))
exists p1 x1 x2.(exists x3.((x1 = x3) & n_parasurfing(x3)) & in(x1,x2) & n_bikini(x2) & n_woman(x1))