a old man walks down the uncrowded road.
An old man is running.
The old man cannot be walking and running at the same time.
exists e1 s1 s2 s3 x1 x2.(n_road(x2) & a_uncrowded(s2) & Theme(s2,x2) & a_down(s3) & Manner(e1,s3) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_man(x1) & a_old(s1) & Theme(s1,x1))
exists e1 s1 x1.(Actor(e1,x1) & v_run(e1) & n_man(x1) & a_old(s1) & Theme(s1,x1))