(S (S (BASENP (DT The) (NNP GNU) (NNP Hurd)) (VP (VBZ forms) (NP (NP (BASENP (DT the) (NN base)) (PP (IN of) (BASENP (DT the) (NNP GNU) (NN operating) (NN system)))) (COMMA ,) (SBAR (WHNP (BASENP (JJ much)) (WHPP (IN of) (WHNP (WDT which)))) (S (VP (VBZ has) (VP (VBN been) (VP (ADVP (RB widely)) (VP (VBN adopted) (PP (IN by) (NP (BASENP (NNS users)) (PP (IN of) (NP (BASENP (JJ other) (JJ Unix-like) (NN operating) (NNS systems)) (COMMA ,) (PP (VBG including) (BASENP (NNP Linux)))))))))))))))) (PERIOD .))