Historical clue formulations

• John ___, "The House of Blue Leaves" playwright — 2015-11-15
• "A Free Man of Color" playwright — 2011-10-02
• "Six Degrees of Separation" playwright — 2007-04-08
• "The House of Blue Leaves" playwright — 1999-02-07
• "The House of Blue Leaves" playwright — 1998-04-12