Assertion: brittle star's arm | /r/HasProperty | arranged around central disk
Facets:
Source sentences:
text: These echinoderms all have several arms arranged around a central disk.
text: These marine invertebrates are not 'true' sea stars, but have a similar body plan, with 5 or more arms arranged around a central disc.
text: Organisms in the Class Asteroidea have several arms (usually between 5 and 40) arranged around a central disk.