( Feedback ( ( was positive ) . ) )
(ROOT (S (NP (NNP Feedback)) (VP (VBD was) (ADJP (JJ positive))) (. .)))
Feedback was positive.
(ROOT (S (NP (JJ Positive) (NN feedback)) (VP (VP (VBZ intensifies) (NP (NP (DT a) (NN change)) (PP (IN in) (NP (NP (DT the) (NN body) (POS 's)) (JJ physiological) (NN condition))))) (CONJP (RB rather) (IN than)) (VP (VBG reversing) (NP (PRP it)))) (. .)))