Historical clue formulations

• Milk: Prefix — 2021-07-18
• Milk: Prefix — 2017-07-25
• Milk: Prefix — 2007-08-07
• Milk: Prefix — 2005-03-09
• Milk: Prefix — 2005-01-28
• Milk: Prefix — 1998-07-19
• Milk: Prefix — 1997-07-12
• Milk: Prefix — 1994-10-30