That's why we tried to kill you.
( That ( ( 's ( why ( we ( tried ( to ( kill you ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT That)) (VP (VBZ 's) (SBAR (WHADVP (WRB why)) (S (NP (PRP we)) (VP (VBD tried) (S (VP (TO to) (VP (VB kill) (NP (PRP you))))))))) (. .)))
That's why we saved your life.
( That ( ( 's ( why ( we ( saved ( your life ) ) ) ) ) . ) )
(ROOT (S (NP (DT That)) (VP (VBZ 's) (SBAR (WHADVP (WRB why)) (S (NP (PRP we)) (VP (VBD saved) (NP (PRP$ your) (NN life)))))) (. .)))