Assertion: sheep's breed | /r/HasProperty | classified by their principal use
Facets:
value: by outward appearance
type: CAUSE
value: according to place of origin
type: OTHER
Source sentences:
text: The numerous breeds may be classified according to place of origin (e.g., Clydesdale, Arabian), by their principal use (e.g., riding, draft), or by outward appearance (light, heavy, pony).