Showing one how to do a jump withe being watched.
The boy performs a trick on his skateboard.
Showing one how to do a jump doesn't imply a boy performs a trick on his skateboard.
exists e1 x1 x2 x3.(while(x3,e1) & n_manner(x3) & exists e2 e3 x4 x5 x6 x7.(Theme(e3,x5) & Actor(e3,x4) & v_do(e3) & Theme(e2,x7) & v_watch(e2) & (x5 = x7) & n_withe(x5) & of(x5,x6) & n_jump(x6)) & Theme(e1,x2) & Actor(e1,x1) & v_show(e1) & n_thing(x2) & card_eq_1(x2) & n_thing(x1))
exists e1 x1 x2 x3.(n_skateboard(x3) & of(x3,x1) & n_male(x1) & n_boy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & on(x2,x3) & n_trick(x2))