A man fishing from the shore in the winter time.
A man fishing for sharks.
He could be fishing for anything, not necessarily sharks.
exists x1 x2 x3 x4 x5.(n_time(x4) & of(x4,x5) & n_winter(x5) & n_shore(x3) & a_topic(x1) & from(x1,x3) & in(x3,x4) & n_fishing(x1) & of(x1,x2) & n_man(x2))
exists x1 x2 x3.(a_topic(x1) & for(x1,x3) & n_shark(x3) & n_fishing(x1) & of(x1,x2) & n_man(x2))