Assertion: sunflower seed | /r/HasProperty | ripe
Facets:
value: for harvesting
type: PURPOSE
Source sentences:
text: Sunflower seeds are ripe when the flower head turns from green to yellow and the seed head begins to brown.
text: Of course, if birds are giving your sunflowers even more attention than they give your feeders, it's a good bet that the sunflower seeds are ripe for harvesting.