I suspect that that is precisely the song's origin.
( I ( ( suspect ( that ( that ( ( is precisely ) ( ( the ( song 's ) ) origin ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP suspect) (SBAR (IN that) (S (NP (DT that)) (VP (VBZ is) (ADVP (RB precisely)) (NP (NP (DT the) (NN song) (POS 's)) (NN origin)))))) (. .)))
I think that's where the song came from.
( I ( ( think ( that ( 's ( where ( ( the song ) ( came from ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP think) (SBAR (IN that) (S (VP (VBZ 's) (SBAR (WHADVP (WRB where)) (S (NP (DT the) (NN song)) (VP (VBD came) (PP (IN from))))))))) (. .)))