(S (S (S (NP (BASENP (NNP Ancient) (NNP Olympia)) (PRN (COMMA ,) (NP (BASENP (NN birthplace)) (PP (IN of) (BASENP (DT the) (NNPS Olympics)))) (COMMA ,))) (VP (VBD was) (VP (ADVP (RB also)) (VBN threatened)))) (CC but) (S (BASENP (NNS firefighters)) (VP (VBD kept) (S (BASENP (DT the) (NN site)) (ADJP (JJ safe)))))) (PERIOD .))