(QT (DQL ``) (QTC (S (BASENP (DT This) (NN virus)) (VP (VBD seemed) (S (VP (TO to) (VP (VP (VB spread) (ADVP (RB very) (RB fast))) (PP (IN over) (BASENP (DT a) (JJ big) (JJ geographic) (NN region)))))))) (PERIOD .)) (DQR ''))