Conversation so far:
What is important about L. Frank Baum's South Dakota years?
L. Frank Baum's description of Kansas in The Wonderful Wizard of Oz is based on his experiences in drought-ridden South Dakota
Who were L. Frank Baum's parents?
L. Frank Baum was the seventh of nine children of Cynthia Ann (née Stanton) and Benjamin Ward Baum.
Did L. Frank Baum have siblings?
L. Frank Baum was the seventh of nine children.

Question: Where did he go to school?
Self-contained rewrite: Where did L. Frank Baum go to school?