A guy on a skateboard does a trick on a ramp while others watch on the other side of the ramp.
The skateboarder performs a trick for others.
Skateboarder performs tricks for others is a rephrase of a guy on a skateboard while others watch
exists e1 p1 x1 x2 x3 x4 x6.(-(x6 = x6) & n_side(x6) & exists e2 x5.(on(e2,x6) & of(x6,x4) & Actor(e2,x5) & v_watch(e2) & -(x5 = x1) & n_person(x5)) & n_ramp(x4) & n_ramp(x4) & n_person(x1) & while(e1,p1) & on(e1,x4) & Theme(e1,x3) & Actor(e1,x1) & v_do(e1) & n_trick(x3) & on(x1,x2) & n_skateboard(x2) & n_guy(x1))
exists e1 x1 x2 x3.(n_skateboarder(x1) & Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & for(x2,x3) & -(x3 = x2) & n_person(x2) & n_person(x3) & n_trick(x2))