Historical clue formulations

• Kneecap — 2019-04-17
• Femur neighbor — 2009-04-02
• Kneecap — 2005-09-04
• Kneecap — 2004-09-06
• Anatomical cap — 2003-07-20
• Cap not found on one's caput — 2003-03-28
• Femur neighbor — 1998-05-29