Well, because it was really interesting stuff.
( Well ( , ( ( because ( it ( was ( really interesting ) ) ) ) ( stuff . ) ) ) )
(ROOT (S (ADVP (RB Well)) (, ,) (SBAR (IN because) (S (NP (PRP it)) (VP (VBD was) (ADJP (RB really) (JJ interesting))))) (VP (VBP stuff)) (. .)))
I enjoyed it because it was interesting.
( I ( ( ( enjoyed it ) ( because ( it ( was interesting ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBD enjoyed) (NP (PRP it)) (SBAR (IN because) (S (NP (PRP it)) (VP (VBD was) (ADJP (JJ interesting)))))) (. .)))