The in-line skater slides down the wall.
The skater does a trick down the wall.
There is nothing to indicate that the skater does a trick.
exists e1 s1 s2 x1 x2.(n_wall(x2) & n_skater(x1) & a_in-line(s1) & Theme(s1,x1) & a_down(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_slide(e1))
exists e1 x1 x2 x3.(n_wall(x3) & n_skater(x1) & down(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2))