Assertion: hairbrush's bristle | /r/HasProperty | boar
Facets:
value: usually
type: DEGREE
Source sentences:
text: Knowing what brushes to buy begins with understanding the difference in bristles (boar, nylon, porcupine, and metal) as well as the four basic categories of brushes (vented, cushioned, round, and classic).
text: The bristles on classic brushes are usually either boar, synthetic or a mix.