(QTL (DQL ``) (QTC (S (BASENP (DT The) (NN situation)) (VP (VBZ has) (VP (VBN changed) (PP (IN since) (NP (BASENP (DT the) (JJ last) (JJ six-party) (NNS talks)) (PP (IN in) (NP (BASENP (NNP September)) (BASENP (JJ last) (NN year))))))))) (PERIOD .)))