(S (S (S (S (BASENP (DT A) (NN zoo) (NN worker)) (VP (VBZ is) (ADJP (JJ dead)))) (CC and) (S (BASENP (NN two) (NNS visitors)) (VP (VBP are) (VP (ADVP (RB seriously)) (VBN injured))))) (SBAR (IN after) (S (BASENP (DT a) (JJ Siberian) (NN tiger)) (VP (VP (VBD escaped) (PP (IN from) (NP (BASENP (DT the) (NNP San) (NNP Francisco) (NNP Zoo)) (PP (IN in) (NP (NP (BASENP (NNP San) (NNP Francisco)) (COMMA ,) (BASENP (NNP California))) (PP (IN in) (BASENP (DT the) (NNP United) (NNPS States)))))))) (CC and) (VP (VBD attacked) (NP (BASENP (NN three) (NNS people)) (SBAR (WHNP (WP who)) (S (VP (VBD were) (PP (IN inside) (BASENP (DT a) (NN cafe)))))))))))) (PERIOD .))