A man fishing under an umbrella.
The man is fishing in the rain.
Just because a man has an umbrella doesn't mean there is rain
exists x1 x2 x3.(a_topic(x1) & under(x1,x3) & n_umbrella(x3) & n_fishing(x1) & of(x1,x2) & n_man(x2))
exists p1 x1 x2.(n_rain(x2) & n_man(x1) & in(p1,x2) & exists x3.((x1 = x3) & n_fishing(x3)))