(S (S (NP (BASENP (NN Today) (POS 's)) (NNS announcements)) (VP (VBP are) (NP (NP (BASENP (DT a) (NN follow-up)) (PP (IN of) (BASENP (DT an) (JJR earlier) (NN press) (NN conference)))) (COMMA ,) (SBAR (WHADVP (WRB where)) (S (BASENP (NNP Dr.) (NNP Korpan)) (VP (SBAR (IN that) (S (NP (EX there)) (VP (VP (VBD were) (NP (BASENP (NN three) (NNS hypotheses)) (PP (IN under) (BASENP (NN consideration))))) (COMMA ,) (S (NP (BASENP (NN one)) (PP (IN of) (BASENP (PRP them)))) (VP (VBG involving) (BASENP (NN dioxin))))))))))))) (PERIOD .))