Conversation so far:
Where was be born?
Detroit, Michigan.
Does he have siblings?
Carson's older brother, Curtis, was born in 1949.
Where did Ben attend school?
a two-classroom school at the Berea Seventh-day Adventist church.
Who are his parents?
Robert Solomon Carson, Jr.

Question: Who is his mother?
Self-contained rewrite: Who is Ben Carson's mother?