(QT (DQL ``) (QTC (S (BASENP (PRP He)) (VP (VP (VBZ understands) (SBAR (WHADVP (WRB how)) (S (VP (TO to) (VP (VB do) (BASENP (PRP it))))))) (CC and) (VP (ADVP (RB also)) (VP (VBZ understands) (SBAR (WHADVP (WRB how)) (S (VP (TO to) (VP (VB keep) (S (BASENP (PRP us)) (ADJP (JJ safe) (PP (IN in) (NP (BASENP (DT a) (NN time)) (PP (IN of) (BASENP (NN peril))))))))))))))) (PERIOD .)) (DQR ''))