( ( ( The subduction ) ( of ( MORB ( containing ( microbial carbon ) ) ) ) ) ( ( can ( account ( for ( ( ( ( both ( the ( ( 13 C-depleted ) nature ) ) ) ( of ( some ( eclogitic diamonds ) ) ) ) and ) ( ( the ( basaltic composition ) ) ( of ( diamond eclogite ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN subduction)) (PP (IN of) (NP (NP (NNP MORB)) (VP (VBG containing) (NP (JJ microbial) (NN carbon)))))) (VP (MD can) (VP (VB account) (PP (IN for) (NP (NP (NP (CC both) (DT the) (ADJP (CD 13) (JJ C-depleted)) (NN nature)) (PP (IN of) (NP (DT some) (JJ eclogitic) (NNS diamonds)))) (CC and) (NP (NP (DT the) (JJ basaltic) (NN composition)) (PP (IN of) (NP (NN diamond) (NN eclogite)))))))) (. .)))
The subduction of MORB containing microbial carbon can account for both the 13 C-depleted nature of some eclogitic diamonds and the basaltic composition of diamond eclogite.
(ROOT (S (SBAR (IN Although) (S (NP (PRP they)) (VP (VBP differ) (ADVP (RB vastly)) (PP (IN in) (NP (NNS hardness)))))) (, ,) (NP (NP (NN pencil) (NN lead)) (CC and) (NP (NNS diamonds))) (DT both) (VP (VBP contain) (NP (NN carbon))) (. .)))