An elder man with a cane takes a walk in a valley by himself.
A man is outdoors.
An elder man is still a man and he is in a valley so he is outdoors.
exists e1 x1 x2 x3 x4 x5.(by(e1,x1) & n_male(x1) & in(e1,x5) & n_valley(x5) & Theme(e1,x4) & Actor(e1,x1) & v_take(e1) & n_walk(x4) & with(x1,x3) & n_cane(x3) & n_man(x1) & of(x1,x2) & n_elder(x2))
exists p1 x1.(exists x2.((x1 = x2) & n_outdoors(x2)) & n_man(x1))