Read this and answer the question. If the question is unanswerable, say "unanswerable".

The evidence of the early texts suggests that Siddhārtha Gautama was born in a community that was on the periphery, both geographically and culturally, of the northeastern Indian subcontinent in the fifth century BCE. It was either a small republic, in which case his father was an elected chieftain, or an oligarchy, in which case his father was an oligarch.

If Siddhartha lived in a small republic, his father would have been a what?
elected chieftain