Assertion: mound | /r/HasProperty | constructed as low rectilinear platform mound
Facets:
value: with apron
type: OTHER
Source sentences:
text: Mound 34 was constructed as a low rectilinear platform mound oriented along a north/south axis maintained by the majority of the Cahokia site, and with a terrace or apron along its west, north, and east sides.