( ( The ( tephra set ) ) ( ( ( consists chiefly ) ( of ( ( two ( voluminous ( , ( coarse ( pumice layers ) ) ) ) ) ( interbedded ( with ( many ( smaller layers ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN tephra) (NN set)) (VP (VBZ consists) (ADVP (RB chiefly)) (PP (IN of) (NP (NP (CD two) (JJ voluminous) (, ,) (JJ coarse) (NN pumice) (NNS layers)) (VP (VBN interbedded) (PP (IN with) (NP (JJ many) (JJR smaller) (NNS layers))))))) (. .)))
The tephra set consists chiefly of two voluminous, coarse pumice layers interbedded with many smaller layers.
(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)))) (. .)))