Assertion: echinoderm's arm | /r/HasAspect | mouth
Facets:
value: at the center
type: LOCATION
Source sentences:
text: Adult echinoderms have distinct radial (or bi-radial in larval forms) symmetrical body divided into multiple sections with hundreds of little sucker-like tube feet (or tentacles) under its arms which all comes with set of organs and a mouth at the center.