Historical clue formulations

• Verdi's "___ tu" — 2021-04-15
• "___ tu" — 2020-07-18
• Verdi's "___ tu" — 2019-10-27
• Form of the Italian "to be" — 2019-09-14
• Verdi's "___ tu" — 2019-09-12
• "___ tu" (Verdi aria) — 2018-10-07
• Form of the Italian verb "to be" — 2017-03-18
• Verdi's "___ tu" — 2015-11-11
• Verdi's "___ tu" — 2015-05-24
• "___ tu" (Verdi aria) — 2015-05-05
• Verdi aria "___ tu" — 2015-01-21
• "___ tu" (Verdi aria) — 2014-09-11
• "Cap'n ___" (1904 novel) — 2014-07-19
• Verdi's "___ tu" — 2014-04-13
• "___ tu" (Verdi aria) — 2014-02-18
• "Cap'n ___" (Joseph C. Lincoln novel) — 2014-01-03
• "___ tu" — 2012-08-22
• "___ tu" — 2012-02-02
• "___ tu" (Verdi aria) — 2011-11-02
• Verdi's "___ tu" — 2011-08-17
• "___ tu" (Verdi aria) — 2011-07-24
• Verdi's "___ tu" — 2011-07-10
• Verdi aria "___ tu" — 2011-05-08
• Verdi's "___ tu" — 2010-08-05
• "___ tu" (Verdi aria) — 2009-11-25
• Verdi aria "___ tu" — 2009-11-02
• European conductor ___ Klas — 2009-04-25
• Verdi's "___ tu" — 2008-06-19
• Verdi's "___ tu" — 2007-03-11
• "___ tu che macchiavi quell'anima" — 2007-02-07
• "___ tu" (Verdi aria) — 2007-01-30
• "___ tu," aria sung by Renato — 2006-12-06
• "___ tu" (aria) — 2006-06-29
• Verdi's "___ tu" — 2005-09-23
• Verdi's "___ tu" — 2005-07-17
• "___ tu" (Verdi aria) — 2005-03-16
• Joseph C. Lincoln's "Cap'n ___" — 2005-02-25
• Verdi's "___ tu" — 2005-02-06
• Epsilon ___ (the planet Vulcan's star) — 2005-01-08
• Verdi's "___ tu che macchiavi quell'anima" — 2004-11-19
• Verdi's "___ tu" — 2004-07-25
• "___ tu" (Verdi aria) — 2004-02-24
• Verdi's "___ tu" — 2003-10-26
• "___ tu che macchiavi" (Verdi lyric) — 2003-03-23
• Epsilon ___ (14th nearest star to Earth) — 2003-03-21
• "___ tu" (aria for Renato) — 2001-04-26
• "___ tu" — 2001-04-11
• Verdi's "___ tu" — 2000-11-28
• "___ tu" (song sung by Renato) — 2000-06-29
• "___ tu" (Verdi aria) — 2000-03-29