Historical clue formulations

• Buy-lines? — 2023-06-04
• "Got milk?" and "I'm lovin' it," for two — 2023-05-01
• "Think" for IBM and "Think outside the bun" for Taco Bell — 2020-11-23
• "Just do it" and "Coke is it!" — 2018-06-19
• "Workers of the world, unite!" and others — 2018-05-27
• Ad agency output — 2017-02-12
• Advertisers' output — 2007-07-14
• Words to live by — 2005-04-09
• Some trademarks — 2004-12-03
• Campaign poster inscriptions — 1997-09-21
• Rallying cries — 1994-09-08