( ( His ears ) ( ( ( told him ) ( of ( ( the proximity ) ( of ( a ( human being ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP$ His) (NNS ears)) (VP (VBD told) (NP (PRP him)) (PP (IN of) (NP (NP (DT the) (NN proximity)) (PP (IN of) (NP (DT a) (NN human) (VBG being)))))) (. .)))
His ears told him of the proximity of a human being.
(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))))))))) (. .)))