Historical clue formulations

• Skilled in — 2023-02-19
• Proficient in — 2022-02-25
• Proficient with — 2016-03-31
• Adept in — 2015-03-13
• Accomplished in — 2009-04-16
• Able to do well — 2007-03-04
• Proficient in — 2003-10-21
• Skilled in — 1999-12-10