Assertion: sweet potato's tuber | /r/HasProperty | harvested
Facets:
Source sentences:
text: All tubers should be harvested when the vines have died or before a frost which will kill the plants.
text: Scab is usually just a cosmetic problem and tubers can still be harvested.
text: Also, when the tubers are harvested, they are normally seasoned at high temperature and humidity, usually for a couple of weeks.