Historical clue formulations

• Go back further than — 2006-10-21
• Go before — 2006-01-30
• Come before — 2005-10-21
• Precede — 2004-03-11
• Come before — 2003-10-30
• Come before — 2002-06-16
• Come before — 1999-11-14
• Come before — 1997-04-06
• Come before — 1994-02-25