(S (S (BASENP (PRP It)) (VP (VBZ is) (NP (BASENP (NN part)) (PP (IN of) (NP (BASENP (DT the) (NNP Cassini-Huygens) (JJ joint) (NN mission)) (PP (IN between) (NP (NP (BASENP (NNP NASA)) (COMMA ,) (BASENP (DT the) (NNP European) (NNP Space) (NNP Agency))) (CC and) (BASENP (DT the) (NNP Italian) (NNP Space) (NNP Agency))))))))) (PERIOD .))