( ( These facts ) ( ( may ( lead ( ( one ( to ( ( a definition ) ( of ( ` ( elemental ( ' carbon ) ) ) ) ) ) ) ( ( ( ( distinct ( from ( that ( of diamond ) ) ) ) or ) ( completely amorphous ) ) carbon ) ) ) ) . ) )
(ROOT (S (NP (DT These) (NNS facts)) (VP (MD may) (VP (VB lead) (NP (NP (NP (CD one)) (PP (TO to) (NP (NP (DT a) (NN definition)) (PP (IN of) (NP (`` `) (JJ elemental) ('' ') (NN carbon)))))) (ADJP (ADJP (JJ distinct) (PP (IN from) (NP (NP (DT that)) (PP (IN of) (NP (NN diamond)))))) (CC or) (ADJP (RB completely) (JJ amorphous))) (NN carbon)))) (. .)))
These facts may lead one to a definition of 'elemental' carbon distinct from that of diamond or completely amorphous carbon.
(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))) (. .)))