A child performs skateboard tricks on a wooden platform.
The skateboard knocks the kid off.
Performs skateboard tricks does not mean knocks the kid off.
exists e1 s1 x1 x2 x3 x4.(on(e1,x4) & n_platform(x4) & a_wooden(s1) & Theme(s1,x4) & Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_trick(x2) & of(x2,x3) & n_skateboard(x3) & n_child(x1))
exists e1 s1 x1 x2.(n_kid(x2) & n_skateboard(x1) & a_off(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_knock(e1))