A skateboarder performs a trick on a ramp.
The skateboarder walks across the skate park with a skateboard inhand.
Performs a trick is not walks.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & on(x2,x3) & n_ramp(x3) & n_trick(x2) & n_skateboarder(x1))
exists e1 x1 x2 x3 x4 x5.(n_park(x2) & of(x2,x3) & n_skate(x3) & n_skateboarder(x1) & with(e1,x4) & n_inhand(x4) & of(x4,x5) & n_skateboard(x5) & across(e1,x2) & Actor(e1,x1) & v_walk(e1))