She knew I was going to do it, but Dad was pretty irate.
( ( ( ( ( She ( knew ( I ( was ( going ( to ( do it ) ) ) ) ) ) ) , ) but ) ( Dad ( was ( pretty irate ) ) ) ) . )
(ROOT (S (S (NP (PRP She)) (VP (VBD knew) (SBAR (S (NP (PRP I)) (VP (VBD was) (VP (VBG going) (S (VP (TO to) (VP (VB do) (NP (PRP it))))))))))) (, ,) (CC but) (S (NP (NNP Dad)) (VP (VBD was) (ADJP (RB pretty) (JJ irate)))) (. .)))
Mom knew what I was up to, however Dad was caught off guard.
( ( ( ( ( Mom ( knew ( what ( I ( was ( up to ) ) ) ) ) ) , ) however ) ( Dad ( was ( caught ( off guard ) ) ) ) ) . )
(ROOT (S (S (NP (NN Mom)) (VP (VBD knew) (SBAR (WHNP (WP what)) (S (NP (PRP I)) (VP (VBD was) (ADVP (RB up) (PP (TO to)))))))) (, ,) (ADVP (RB however)) (S (NP (NNP Dad)) (VP (VBD was) (VP (VBN caught) (PP (IN off) (NP (NN guard)))))) (. .)))