End of digression and back to MUSKRAT-KAT- Muskrat Ramble is credited to Edward  Kid  Ory and Ray Gilbert.
( ( ( ( ( End ( of ( ( digression and ) back ) ) ) ( to MUSKRAT-KAT ) ) - ) ( ( Muskrat Ramble ) ( is ( credited ( to ( Edward ( Kid ( Ory ( and ( Ray Gilbert ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NP (NN End)) (PP (IN of) (NP (NN digression) (CC and) (NN back)))) (VP (TO to) (VP (VB MUSKRAT-KAT)))) (: -) (S (NP (NNP Muskrat) (NNP Ramble)) (VP (VBZ is) (VP (VBN credited) (PP (TO to) (NP (NNP Edward) (NNP Kid) (NNP Ory) (CC and) (NNP Ray) (NNP Gilbert)))))) (. .)))
Ory and Gilbert are the ones who created the Muskrat Ramble.
( ( ( Ory and ) Gilbert ) ( ( are ( ( the ones ) ( who ( created ( the ( Muskrat Ramble ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Ory) (CC and) (NNP Gilbert)) (VP (VBP are) (NP (NP (DT the) (NNS ones)) (SBAR (WHNP (WP who)) (S (VP (VBD created) (NP (DT the) (NNP Muskrat) (NNP Ramble))))))) (. .)))