( It ( ( was ( thought ( that ( ( ( the process ) ( of ( ( ( retaining ( solids ( in ( the stomach ) ) ) ) and ) ( ( allowing liquids ) ( to ( empty ( into ( the duodenum ) ) ) ) ) ) ) ) ( , ( would ( expose ( ( the ( solid nutrients ) ) ( to ( continuously ( renewed ( , ( fresh ( gastric juice ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBD was) (VP (VBN thought) (SBAR (IN that) (S (NP (NP (DT the) (NN process)) (PP (IN of) (S (VP (VP (VBG retaining) (NP (NP (NNS solids)) (PP (IN in) (NP (DT the) (NN stomach))))) (CC and) (VP (VBG allowing) (NP (NNS liquids)) (S (VP (TO to) (VP (VB empty) (PP (IN into) (NP (DT the) (NN duodenum))))))))))) (, ,) (VP (MD would) (VP (VB expose) (S (NP (DT the) (JJ solid) (NNS nutrients)) (VP (TO to) (VP (VB continuously) (NP (JJ renewed) (, ,) (JJ fresh) (JJ gastric) (NN juice))))))))))) (. .)))
It was thought that the process of retaining solids in the stomach and allowing liquids to empty into the duodenum, would expose the solid nutrients to continuously renewed, fresh gastric juice.
(ROOT (S (NP (JJ Gastric) (NN emptying)) (VP (VBZ is) (VP (VBN regulated) (PP (IN by) (NP (NP (PDT both) (DT the) (NN stomach)) (CC and) (NP (DT the) (NN duodenum)))))) (. .)))