(QT (DQL ``) (QTC (S (BASENP (PRP This)) (VP (VBZ is) (SBAR (WHADVP (WRB how)) (S (BASENP (DT the) (NN world)) (VP (VBZ has) (VP (VBN become) (PP (IN in) (BASENP (DT the) (JJ 21st) (NN century))))))))) (PERIOD .)) (DQR ''))