Mountain climbing down the side of a rocky cliff.
Skiing down the side of a rocky cliff.
The sentences switch from mountain climbing down the rocky cliff to skiing down the rocky cliff.
exists e1 s1 x1 x2 x3.(n_side(x2) & ne_nam_mountain(x1) & down(e1,x2) & of(x2,x3) & n_cliff(x3) & a_rocky(s1) & Theme(s1,x3) & Actor(e1,x1) & v_climb(e1))
exists e1 s1 x1 x2 x3.(n_side(x2) & down(e1,x2) & of(x2,x3) & n_cliff(x3) & a_rocky(s1) & Theme(s1,x3) & Actor(e1,x1) & v_ski(e1) & n_thing(x1))