A man reading a book outside.
Someone is outdoors.
He could be outside, without someone being outdoors.
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_read(e1) & n_outside(x3) & of(x3,x4) & n_book(x4) & (x1 = x2) & n_man(x1))
exists p1 x1.(exists x2.((x1 = x2) & n_outdoors(x2)) & n_person(x1))