Assertion: sheep's wool | /r/HasProperty | prolific
Facets:
value: in most modern sheep breeds
type: OTHER
Source sentences:
text: Fiber from the outer coats of wild sheep, technically known as hair, is not suitable for spinning into wool, which is why ancient shepherds bred their animals to produce longer and longer undercoat fibers: the wool, which in most modern sheep breeds is prolific and ever-growing.