Historical clue formulations

• "Lake Wobegon Days" writer — 2015-10-18
• Garrison of "A Prairie Home Companion" — 2013-01-28
• Garrison of "A Prairie Home Companion" — 2012-12-17
• Garrulous Garrison — 2011-09-25
• Garrison in Minnesota — 2011-02-20
• Radio host Garrison — 2009-03-10