( ( The palmar ) ( ( grasp ( reflex ( is ( supported ( to ( be ( ( a ( vestigial behavior ) ) ( in ( human infants ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN palmar)) (VP (VBP grasp) (SBAR (S (NP (NNP reflex)) (VP (VBZ is) (VP (VBN supported) (S (VP (TO to) (VP (VB be) (NP (NP (DT a) (JJ vestigial) (NN behavior)) (PP (IN in) (NP (JJ human) (NNS infants)))))))))))) (. .)))
The palmar grasp reflex is supported to be a vestigial behavior in human infants.
(ROOT (S (NP (NNP Reflex) (NNS behaviors)) (VP (VBP are) (NP (NP (DT the) (RB only) (JJ innate) (NNS behaviors)) (PP (IN in) (NP (NNS humans))))) (. .)))