… 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. 
( I ( ( must ( lead ( two lives ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (MD must) (VP (VB lead) (NP (CD two) (NNS lives)))) (. .)))