A man in a blue bodysuit surfing.
There is a woman surfing.
It is said that there is a man surfing, not a woman.
exists s1 x1 x2 x3.(a_topic(x1) & in(x1,x2) & n_surfing(x2) & of(x2,x3) & n_bodysuit(x3) & a_blue(s1) & Theme(s1,x2) & n_man(x1))
exists p1 x1 x2 x3.((x1 = x2) & n_surfing(x2) & of(x2,x3) & n_woman(x3))