Assertion: grinding stone | /r/CapableOf | bear long groove
Facets:
Source sentences:
text: Huffman (2006, p. 67) states that earlier tool-kits used to process sorghum and millet are characterized by flat-handstones held in one hand with at least two articulation surfaces resulting from use-wear against a lower grinding-stone bearing a long groove (ellipsoid grinding-hollow).