A man is walking on a rocky trail up a hill.
The man is walking up the hill.
Both sentences imply that a man is walking up on a hill.
exists e1 s1 x1 x2 x3.(up(e1,x3) & n_hill(x3) & on(e1,x2) & n_trail(x2) & a_rocky(s1) & Theme(s1,x2) & Actor(e1,x1) & v_walk(e1) & n_man(x1))
exists e1 s1 x1 x2.(n_hill(x2) & n_man(x1) & a_up(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1))