Historical clue formulations

• South American tuber — 2025-08-24
• South American tuber — 2017-12-19
• Andean tuber — 2017-06-04
• "L'___ del Cairo" (unfinished Mozart opera) — 2016-05-22
• South American tuber — 2015-11-29
• Important Peruvian crop — 2015-09-04
• South American tuber — 2014-06-01
• Andean tuber — 2014-04-20
• South American tuber — 2013-06-20
• Andean tuber — 2012-05-26
• Andean vegetable — 2011-07-23
• Andean tuber — 2010-10-29
• Goose, in Spain or Italy — 2010-02-06
• Mozart's "L'___ del Cairo" — 2009-05-28
• South American tuber — 2009-05-24
• South American tuber — 2008-03-16
• Andean tuber — 2007-12-12
• Tuberous plant of the Andes — 2006-11-30
• Edible South American tuber — 2006-06-25
• South American tuber — 2004-01-11
• Andean tuber — 2002-08-23
• Wood sorrel — 2002-04-28
• Mozart's "L'___ del Cairo" — 2001-06-12
• Mozart's "L'___ del Cairo" — 2001-04-13
• Mozart's "L'___ del Cairo" — 2001-02-04
• Wood sorrel — 1994-11-12
• Andean tuber — 1994-10-28
• Altiplano tuber — 1994-09-08
• Wood sorrel — 1994-05-31