(S (S (NP (BASENP (DT Each) (JJ different) (NN editor)) (SBAR (WHNP (WP who)) (S (VP (VP (VBZ makes) (BASENP (NNS changes))) (PP (TO to) (BASENP (DT the) (NN article))))))) (VP (VP (VBZ has) (BASENP (DT a) (JJ distinct) (NN color))) (COMMA ,) (S (VP (VBG allowing) (SBAR (IN for) (S (NP (BASENP (DT that) (NN editor) (POS 's)) (NN text)) (VP (TO to) (VP (VB be) (VP (VBN tracked) (PP (IN over) (BASENP (NN time)))))))))))) (PERIOD .))