(S (S (BASENP (PRP It)) (VP (MD must) (VP (VB be) (VP (VP (VBN approved) (PP (IN in) (NP (BASENP (DT a) (JJ joint) (NN session)) (PP (IN of) (NP (BASENP (DT the) (NNP Senate)) (CC and) (NP (BASENP (DT the) (NNP Chamber)) (PP (IN of) (BASENP (NNPS Deputies))))))))) (COMMA ,) (PP (IN with) (NP (ADVP (IN at) (JJS least)) (BASENP (DT a) (JJ two-thirds) (NN majority)))))))) (PERIOD .))