Historical clue formulations

• Name hidden in "margin of error" — 2022-11-22
• Heisman winner Torretta — 2020-12-01
• Vocalist Vannelli — 2019-09-17
• ___ Torretta, 1992 Heisman Trophy winner — 2016-01-19
• Vocalist Vannelli — 2014-12-16
• Pop singer Vannelli — 2014-09-04
• Football Hall-of-Famer Marchetti — 2012-05-11
• ___ Franco (watch brand) — 2011-03-20
• Singer Vannelli of 1970s-'80s pop — 2011-03-18
• Soft-rock singer Vannelli — 2009-12-10
• "I Just Wanna Stop" singer ___ Vannelli — 2005-12-12
• 1970's-80's singer Vannelli — 2004-03-11
• 1992 Heisman winner ___ Torretta — 2004-01-28
• Italian painter Severini — 2003-03-08
• Italian pet form of John — 2001-03-23
• Vocalist Vannelli — 2000-07-26
• Football Hall-of-Famer Marchetti — 2000-06-30