( ( The ( middle ear ) ) ( ( includes ( ( ( ( ( the ( ear drum ) ) , ) ( ( three ( middle ( ear bones ) ) ) ( -LRB- ( ossicles -RRB- ) ) ) ) and ) ( the ( eustachian tube ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ middle) (NN ear)) (VP (VBZ includes) (NP (NP (DT the) (NN ear) (NN drum)) (, ,) (NP (NP (CD three) (JJ middle) (NN ear) (NNS bones)) (PRN (-LRB- -LRB-) (NP (NNS ossicles)) (-RRB- -RRB-))) (CC and) (NP (DT the) (NN eustachian) (NN tube)))) (. .)))
The middle ear includes the ear drum, three middle ear bones (ossicles) and the eustachian tube.
(ROOT (S (NP (DT The) (JJ mammalian) (JJ middle) (NN ear)) (VP (VBZ has) (NP (CD three) (NNS bones))) (. .)))