( He ( ( was ( ( ( married ( to Pronoe ) ) , ) ( by ( whom ( he ( had ( ( ( ( ( two sons ) , ) Pleuron ) and ) Calydon ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBD was) (VP (VBN married) (PP (TO to) (NP (NNP Pronoe))) (, ,) (PP (IN by) (SBAR (WHNP (WP whom)) (S (NP (PRP he)) (VP (VBD had) (NP (NP (CD two) (NNS sons)) (, ,) (NP (NNP Pleuron)) (CC and) (NP (NNP Calydon))))))))) (. .)))
He was married to Pronoe, by whom he had two sons, Pleuron and Calydon.
(ROOT (S (NP (NP (DT The) (NN pleura)) (SBAR (WHNP (WDT that)) (S (VP (VBZ surrounds) (NP (DT the) (NNS lungs)))))) (VP (VBZ consists) (PP (IN of) (NP (CD two) (NNS layers)))) (. .)))