Historical clue formulations

• Pioneering urbanologist Jane — 2015-01-04
• A. J. ___, author of the best seller "The Know-It-All: One Man's Humble Quest to Become the Smartest Person in the World" — 2014-03-08
• "Grease" co-writer Jim — 2009-02-07
• ___-rod (flower of the lily family) — 1999-01-29
• ___ ladder — 1996-09-12