Conversation so far:
What was the earliest record of the Arapaho?
Around 3,000 years ago, the ancestral Arapaho-speaking people (Heeteinono'eino' ) lived in the western Great Lakes region along the Red River Valley.
Who was the chief of the tribe?
CANNOTANSWER.
How many Arapaho were there?
CANNOTANSWER.

Question: What can you tell me about the tribe?
Self-contained rewrite: What can you tell me about the Arapaho?