… I saw that I must lead two lives.
( ... ( I ( ( saw ( that ( I ( must ( lead ( two lives ) ) ) ) ) ) . ) ) )
(ROOT (S (: ...) (NP (PRP I)) (VP (VBD saw) (SBAR (IN that) (S (NP (PRP I)) (VP (MD must) (VP (VB lead) (NP (CD two) (NNS lives))))))) (. .)))
I must lead two lives; one in perfectly amiable company with the president, and one whispering in the ears of his enemies as his back was turned. 
( ( ( ( ( I ( must ( ( lead ( ( ( two lives ) ; ) ( one ( in ( ( perfectly amiable ) company ) ) ) ) ) ( with ( the president ) ) ) ) ) , ) and ) ( ( ( one whispering ) ( in ( ( the ears ) ( of ( ( his enemies ) ( as ( his back ) ) ) ) ) ) ) ( was turned ) ) ) . )
(ROOT (S (S (NP (PRP I)) (VP (MD must) (VP (VB lead) (NP (NP (CD two) (NNS lives)) (: ;) (NP (NP (CD one)) (PP (IN in) (NP (ADJP (RB perfectly) (JJ amiable)) (NN company))))) (PP (IN with) (NP (DT the) (NN president)))))) (, ,) (CC and) (S (NP (NP (CD one) (NN whispering)) (PP (IN in) (NP (NP (DT the) (NNS ears)) (PP (IN of) (NP (NP (PRP$ his) (NNS enemies)) (PP (IN as) (NP (PRP$ his) (NN back)))))))) (VP (VBD was) (VP (VBN turned)))) (. .)))