Historical clue formulations

• Retract — 2017-06-30
• Take back — 2008-08-31
• Take back — 2004-07-21
• Retract — 2004-04-24
• Take back, in a way — 2002-06-30
• Take back, in a way — 2000-01-23
• Retract, as words — 1996-03-06