(S (S (NP (NP (BASENP (DT A) (NN team)) (PP (IN of) (BASENP (NNP Cassini) (NNS researchers)))) (VP (VBN led) (PP (IN by) (NP (BASENP (NNP Candice) (NNP Hansen)) (PP (IN of) (NP (BASENP (DT the) (NNP Planetary) (NNP Science) (NNP Institute)) (PP (IN in) (BASENP (NNP Tucson) (COMMA ,) (NNP Arizona))))))))) (COMMA ,) (VP (VP (VP (VBD measured) (NP (BASENP (NN gas) (NN shooting)) (PP (IN out) (PP (IN of) (NP (BASENP (JJ distinct) (NNS jets)) (VP (VBG originating) (PP (IN in) (NP (BASENP (DT the) (NN moon) (POS 's)) (BASENP (JJ south) (JJ polar) (NN region)))))))))) (PP (IN at) (NP (QP (BASENP (NN five)) (PP (TO to) (BASENP (NN eight) (NNS times)))) (NP (BASENP (DT the) (NN speed)) (PP (IN of) (BASENP (NN sound))))))) (COMMA ,) (ADJP (ADJP (BASENP (JJ several) (NNS times)) (JJR faster)) (PP (IN than) (VP (ADVP (RB previously)) (VBN measured)))))) (PERIOD .))