Assertion: gopher tortoise's plastron | /r/HasProperty | joined
Facets:
value: after being filled with small stones
type: TEMPORAL
value: together
type: MANNER
Source sentences:
text: They were also used to make ceremonial rattles: the carapace, or upper dome-shaped half of the shell, and the plastron, or flat underside of the shell, were joined together after being filled with small stones or seeds.