Conversation so far:
What did the Hansons do in 1992?
Hason's first performance as a professional group took place in 1992 at the Mayfest Arts Festival in Tulsa.
Did the Hansons have a good fan base?
Yes Hanson did, enough to have one day out of the year dedicated to them.

Question: What did the good fan base allow them to do?
Self-contained rewrite: What did the good fan base allow Hanson to do?