The tag implication #47766 mule -> equine has been approved.
Reason: https://en.wikipedia.org/wiki/Mule
The mule is a domestic equine hybrid between a donkey and a horse. It is the offspring of a male donkey (a jack) and a female horse (a mare).
EDIT: The tag implication mule -> equine (forum #352401) has been approved by @gattonero2001.
Updated by auto moderator