( ( Describe ( ( the ( structure ( , ( function ( , ( and location ) ) ) ) ) ) ( of ( ( sphincter muscles ) ( along ( the ( alimentary canal ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Describe) (NP (NP (DT the) (NN structure) (, ,) (NN function) (, ,) (CC and) (NN location)) (PP (IN of) (NP (NP (NN sphincter) (NNS muscles)) (PP (IN along) (NP (DT the) (JJ alimentary) (NN canal))))))) (. .)))
Describe the structure, function, and location of sphincter muscles along the alimentary canal.
(ROOT (S (S (VP (VBG Acting) (PP (IN like) (NP (NNS drawstrings))) (S (VP (TO to) (VP (VB close) (PRT (RP off)) (NP (DT the) (JJ alimentary) (NN canal))))))) (, ,) (NP (DT the) (NN sphincter)) (VP (VBZ regulates) (NP (NP (DT the) (NN passage)) (PP (IN of) (NP (NP (NN material)) (PP (IN between) (NP (NNS compartments))))))) (. .)))