Assertion: stone's seed | /r/HasProperty | churned in concrete mixer
Facets:
value: with sand
type: OTHER
value: with sharp gravel
type: OTHER
Source sentences:
text: Seed may be tumbled or churned in a concrete mixer with sharp gravel or sand, or in a special drum lined with abrasive material such as sandpaper, cement or crushed glass or incorporating rotating abrasive disks (