Two children wearing hats hang onto to bamboo trees.
Bamboos trees are extinct.
if bamboo trees are extinct, the children cannot hang onto them.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & Theme(e2,x3) & Actor(e2,x2) & v_wear(e2) & onto(e1,x5) & n_tree(x5) & of(x5,x6) & n_bamboo(x6) & a_to(s1) & Theme(s1,x5) & Actor(e1,x4) & v_hang(e1) & (x3 = x4) & n_hat(x3) & (x1 = x2) & n_child(x1) & card_eq_2(x1))
exists s1 x1 x2.(Theme(s1,x1) & a_extinct(s1) & n_tree(x1) & (x1 = x2) & ne_nam_bamboos(x2))