( ( In fact ) ( , ( ( one ( of ( ( the ( ( most enduring ) characteristics ) ) ( of ( online discussions ) ) ) ) ) ( ( ( is ( ( the ( frequent use ) ) ( of citations ) ) ) ( that ( ( ( the linkage ) ( of ( the Web ) ) ) ( makes possible ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (NN fact))) (, ,) (NP (NP (CD one)) (PP (IN of) (NP (NP (DT the) (ADJP (RBS most) (JJ enduring)) (NNS characteristics)) (PP (IN of) (NP (JJ online) (NNS discussions)))))) (VP (VBZ is) (NP (NP (DT the) (JJ frequent) (NN use)) (PP (IN of) (NP (NNS citations)))) (SBAR (IN that) (S (NP (NP (DT the) (NN linkage)) (PP (IN of) (NP (DT the) (NNP Web)))) (VP (VBZ makes) (ADJP (JJ possible)))))) (. .)))
In fact, one of the most enduring characteristics of online discussions is the frequent use of citations that the linkage of the Web makes possible.
(ROOT (S (NP (JJ Certain) (NNS characteristics)) (VP (VBP are) (ADVP (RB frequently)) (VP (VBN inherited) (ADVP (RB together)) (PP (RB because) (IN of) (ADJP (JJ linkage))))) (. .)))