Conversation so far:
Where was Harriet born?
Madison, Maryland.
When was she born?
Maryland.
As with many slaves in the United States, neither the exact year nor place of Araminta's birth is known.
Who was her family?
Harriet ("Rit") Green and Ben Ross.
Were her parents slaves ?
Rit was owned by Mary Pattison Brodess (and later her son Edward).

Question: What about Ben Ross, was he a slave ?
Self-contained rewrite: What about Ben Ross being a slave ?