(S (S (QT (DQL ``) (QTC (S (CC But) (S (BASENP (PRP we)) (VP (VBD knew) (SBAR (IN that) (S (NP (BASENP (DT the) (NN health)) (PP (IN of) (BASENP (DT the) (NN president)))) (VP (VBD had) (VP (VP (VBN become) (NP (BASENP (DT a) (NN source)) (PP (IN of) (BASENP (NN concern))))) (PP (IN in) (BASENP (JJ recent) (NNS days)))))))))) (COMMA ,)) (DQR '')) (S (BASENP (PRP he)) (VP (VBD said)))) (PERIOD .))