( ( ( ( The other ) , ) ( ( more ( common forms ) ) ( of carbon ) ) ) ( ( are ( ( ( ( ( graphite -LRB- ) ( your ( pencil point ) ) ) -RRB- ) and ) diamond ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ other)) (, ,) (NP (NP (JJR more) (JJ common) (NNS forms)) (PP (IN of) (NP (NN carbon))))) (VP (VBP are) (NP (NP (NP (NN graphite)) (-LRB- -LRB-) (NP (PRP$ your) (NN pencil) (NN point)) (-RRB- -RRB-)) (CC and) (NP (NN diamond)))) (. .)))
The other, more common forms of carbon are graphite (your pencil point) and diamond.
(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))) (. .)))