(S (S (S (BASENP (PRP He)) (VP (MD could) (VP (VB have) (VP (VBN risked) (BASENP (PRPD his) (NN life)))))) (SBAR (IN as) (S (BASENP (PRP he)) (VP (VBD was) (VP (VBN diagnosed) (PP (IN with) (BASENP (JJ unstable) (NN angina)))))))) (PERIOD .))