(S (S (NP (BASENP (NN 16)) (PP (IN of) (BASENP (NNS those)))) (VP (VBP are) (VP (VBN reported) (S (VP (TO to) (VP (VB be) (NP (BASENP (NNS firefighters)) (SBAR (WHNP (WP who)) (S (VP (VBD were) (VP (VBG battling) (BASENP (DT the) (NNS blazes))))))))))))) (PERIOD .))