Assertion: mule | /r/ObjectUse | used as pack animals
Facets:
value: historically
type: TEMPORAL
value: often
type: TEMPORAL
value: by merchants
type: OTHER
Source sentences:
text: Mules can be equipped with chests and used as pack animals.
text: Mules have historically been used as pack animals because they can carry heavy loads across long distances.
text: Historically, mules have been used as pack animals for grueling work on the farm and ranch.
text: Mules are domestic animals who are often used as pack animals by merchants.