(S (S (S (S (BASENP (DT Some) (NNS sources)) (VP (VBP suggest) (NP (BASENP (NN nineteen) (NNS fatalities)) (CC and) (BASENP (NN two) (NNS survivors))))) (CONJP (COMMA ,) (CC and)) (S (BASENP (NNS others)) (VP (VBP say) (SBAR (S (BASENP (EX there)) (VP (VBD were) (NP (BASENP (NN 26) (NNS deaths)) (CC and) (BASENP (DT no) (NNS survivors))))))))) (COLON ;) (S (BASENP (PRP it)) (VP (MD should) (VP (VB be) (VP (VBN noted) (SBAR (IN that) (S (SBAR (IN if) (S (NP (BASENP (DT either)) (PP (IN of) (BASENP (DT these)))) (VP (VBD were) (ADJP (JJ correct))))) (S (ADVP (RB then)) (S (BASENP (EX there)) (VP (VP (VBD were) (BASENP (QP (ADVP (RBR more) (IN than)) (NN twenty)))) (PP (IN on) (BASENP (NN board))))))))))))) (PERIOD .))