(S (S (S (S (BASENP (NN Fifteen) (NNS people)) (VP (VBD were) (ADJP (JJ able) (S (VP (TO to) (VP (VB swim) (PP (TO to) (BASENP (NN safety))))))))) (CONJP (COMMA ,) (CC but)) (S (BASENP (PRP it)) (VP (VBZ is) (ADJP (JJ unlikely) (SBAR (S (NP (BASENP (DT the) (JJ other) (NNS passengers)) (PP (IN of) (BASENP (DT the) (NN boat)))) (VP (VBD were) (ADJP (JJ able) (S (VP (TO to) (VP (VB survive)))))))))))) (COMMA ,) (PP (VBG according) (PP (TO to) (BASENP (DT a) (NN report))))) (PERIOD .))