Conversation so far:
Where did Medgar Evers and Myrlie Evers move to?
Medgar Evers and Myrlie Evers moved to Mound Bayou.
What state was Mound Bayou in?
Medgar Evers and Myrlie Evers moved to Mound Bayou, Mississippi.
What was special about Mound Bayou, Mississippi for Medgar Evers?
Medgar Evers and Myrlie Evers moved to Mound Bayou, Mississippi, a town developed by African Americans.

Question: What did Evers do?
Self-contained rewrite: What did Medgar Evers do in Mound Bayou, Mississippi?