that lacks both a purpose and a strong pulse 
(ROOT (S (NP (DT that)) (VP (VBZ lacks) (NP (CC both) (NP (DT a) (NN purpose)) (CC and) (NP (DT a) (JJ strong) (NN pulse))))))
(ROOT (S (NP (DT )) (VP (VBZ ) (NP (CC ) (NP (DT ) (NN )) (CC ) (NP (DT ) (JJ ) (NN ))))))