An elder man with a cane takes a walk in a valley by himself.
The man is traveling on a bike.
One cannot walk and ride a bike simultaneously.
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 e1 x1 x2.(n_man(x1) & on(e1,x2) & n_bike(x2) & Actor(e1,x1) & v_travel(e1))