( ( ( The Physiology ) ( of ( Hearing ( The ( human ear ) ) ) ) ) ( ( is ( composed ( of ( ( ( ( ( ( the external ) , ) middle ) , ) and ) ( inner ears ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNP Physiology)) (PP (IN of) (S (VP (VBG Hearing) (NP (DT The) (JJ human) (NN ear)))))) (VP (VBZ is) (VP (VBN composed) (PP (IN of) (NP (NP (DT the) (JJ external)) (, ,) (NP (NN middle)) (, ,) (CC and) (NP (JJ inner) (NNS ears)))))) (. .)))
The Physiology of Hearing The human ear is composed of the external, middle, and inner ears.
(ROOT (S (NP (DT The) (NNS ears)) (VP (VBP are) (NP (NP (DT an) (JJ external) (NN feature)) (PP (IN in) (NP (JJ human) (NNS beings))) (SBAR (S (VP (VBZ is) (ADJP (JJ responsible) (PP (IN for) (NP (NN balance))))))))) (. .)))