(S (S (S (NP (BASENP (DT A) (JJ limited) (NN port)) (PP (IN of) (BASENP (NNP Linux)))) (VP (ADVP (RB already)) (VP (VBZ runs) (PP (IN on) (BASENP (NNP L4)))))) (COMMA ,) (VP (VBN known) (PP (IN as) (BASENP (NNP L4Linux))))) (PERIOD .))