(S (S (SBAR (ADVP (RB Ever)) (SBAR (IN since) (S (NP (BASENP (DT the) (NNP Hamas) (NN movement)) (PRN (COMMA ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ refuses) (S (VP (TO to) (VP (VP (VB recognize) (BASENP (NNP Israel))) (CC and) (VP (VB stop) (NP (BASENP (NNS attacks)) (PP (IN on) (BASENP (NNP Israel))))))))))) (COMMA ,))) (VP (VP (VBD won) (NP (BASENP (NNS elections)) (PP (IN for) (BASENP (DT the) (JJ Palestinian) (NN parliament))))) (BASENP (JJ last) (NN year)))))) (COMMA ,) (S (NP (EX there)) (VP (VBP have) (VP (VP (VBN been) (BASENP (VBN repeated) (NNS clashes))) (PP (IN between) (BASENP (DT the) (NN two) (NNS groups))))))) (PERIOD .))