(S (S (SBAR (IN As) (S (BASENP (JJR more) (JJ Arctic) (NN ice)) (VP (VBZ melts)))) (COMMA ,) (S (BASENP (DT the) (NNS ships)) (VP (VBP sail) (PP (IN through) (BASENP (JJ uncharted) (NNS waters)))))) (PERIOD .))