Assertion: esophagus's sphincter | /r/CapableOf | keep the esophagus
Facets:
value: at both terminations
type: TEMPORAL
Source sentences:
text: At the superior end ofis the upper esophageal sphincter that keeps the esophagus closed where it meets the pharynx.
text: Sphincters protect the esophagus at both terminations.
text: At the superior end of the esophagus is the upper esophageal sphincter that keeps the esophagus closed where it meets the pharynx.