(S (S (BASENP (JJ Several) (NNS surveys)) (VP (VBP have) (VP (VBN suggested) (SBAR (IN that) (S (S (NP (BASENP (NNS MPs)) (PP (IN in) (BASENP (DT the) (NN minority) (NN parliament)))) (VP (MD will) (VP (ADVP (RB overwhelmingly)) (VP (VB reaffirm) (NP (BASENP (NN support)) (PP (IN for) (BASENP (JJ same-sex) (NN marriage)))))))) (SBAR (IN once) (S (BASENP (DT a) (NN vote)) (VP (VBZ has) (VP (VBN held)))))))))) (PERIOD .))