Historical clue formulations

• Mario who wrote "The Godfather" — 2021-05-21
• "The Last Don" author — 2020-05-01
• Mario who wrote "The Godfather" — 2018-08-27
• Author of the line "It means Luca Brasi sleeps with the fishes" — 2018-08-09
• Two-time Oscar-winning screenwriter — 2014-06-28
• "The Last Don" author — 2012-06-24
• "The Godfather" author — 2011-09-06
• "The Godfather" novelist — 2007-01-30
• Mario who wrote "The Godfather" — 2004-09-13
• Vito Corleone's creator — 2003-01-07
• Vito Corleone's creator — 2002-08-12
• "Fools Die" author — 2001-03-02
• 1972 and '74 Oscar-winning screenwriter — 1999-04-29
• Corleone's creator — 1999-02-24
• "The Godfather" author — 1998-12-22