Assertion: mule | /r/CapableOf | average estimated 18 years of work
Facets:
value: compared to 15 for the horse
type: OTHER
value: in farming days
type: TEMPORAL
Source sentences:
text: In farming days of long ago, when at least a portion of the animal’s value depended upon how long it could work, mules averaged an estimated 18 years of work, compared to 15 for the horse.