question: What clans were most regional clans ' chiefs also a member of ?
answer: Fujiwara , Minamoto , or Taira clans
turker_answer: The most regional clans ' chiefs were also a member of Fujiwara , Minamoto , or Taira clans .
rule-based: Most regional clans ' chiefs were also a member of Fujiwara , Minamoto , or Taira clans .