A person is rock climbing.
The person is a man
You should not assume that a person rock climbing is a man because women and children also enjoy rock climbing.
exists p1 x1.(exists x2 x3.((x1 = x2) & n_climb(x2) & of(x2,x3) & n_rock(x3)) & n_person(x1))
exists p1 x1.(n_person(x1) & exists x2.((x1 = x2) & n_man(x2)))