Conversation so far:
where is the bull run held in spain
The Running of the Bulls is held in Pamplona, Spain during the San Fermin festival.
what happens in the running of the bulls
The Running of the bulls is an event that involves running in front of a small group of cattle.
how many cows are used in the running of the bulls
For the Running of the bulls they use a small group of cattle, typically six but sometimes ten or more.

Question: where did the running tradition come from
Self-contained rewrite: where did the running of the bulls tradition come from