(QT (DQL ``) (QTC (S (S (BASENP (PRP It)) (VP (VBZ 's) (ADJP (JJ hard) (SBAR (S (VP (TO to) (VP (VP (VB keep) (PRT (RP up))) (PP (IN with))))))))) (SBAR (IN unless) (S (BASENP (PRP we)) (VP (VP (VBD damp) (PRT (RP down))) (PP (IN on) (NP (BASENP (NN some)) (PP (IN of) (NP (BASENP (DT the) (NNS causes)) (PP (IN of) (BASENP (DT the) (NN evolution))))))))))) (PERIOD .)) (DQR ''))