(S (S (ADVP (RB However)) (COMMA ,) (S (NP (BASENP (NN two) (JJ republican) (JJ splinter) (NNS groups)) (PRN (COMMA ,) (NP (NP (BASENP (DT the) (NNP Continuity) (NNP Irish) (NNP Republican) (NNP Army)) (PRN (LRB -LRB-) (BASENP (NNP CIRA)) (RRB -RRB-))) (CC and) (NP (BASENP (DT the) (NNP Real) (NNP Irish) (NNP Republican) (NNP Army)) (PRN (LRB -LRB-) (BASENP (NNP RIRA)) (RRB -RRB-)))) (COMMA ,))) (VP (VP (VBP have) (VP (VBN refused) (S (VP (TO to) (VP (VP (VB lay) (PRT (RP down))) (BASENP (PRPD their) (NNS arms))))))) (CC and) (VP (VBP have) (VP (VBN continued) (S (VP (TO to) (VP (VB undertake) (NP (BASENP (NNS attacks)) (PP (VBG including) (NP (BASENP (NN three) (NNS murders)) (PP (IN in) (NP (BASENP (NNP March)) (PP (IN of) (BASENP (NN 2009)))))))))))))))) (PERIOD .))