a child is doing a back flip whilst jumping on a trampoline.
A child is practicing for a stunt competition.
child doing qa black flip does not imply he is practicing for a competition.
exists e2 e1 s1 s2 x1 x2 x3 x4.(Theme(e2,x2) & Actor(e2,x1) & v_do(e2) & on(e1,x4) & n_trampoline(x4) & Actor(e1,x3) & v_jump(e1) & (x2 = x3) & n_whilst(x2) & a_flip(s2) & Theme(s2,x2) & a_back(s1) & Theme(s1,x2) & n_child(x1))
exists e1 s1 x1 x2.(for(e1,x2) & n_competition(x2) & a_stunt(s1) & Theme(s1,x2) & Actor(e1,x1) & v_practice(e1) & n_child(x1))