Historical clue formulations

• Close — 2018-05-11
• Almost matching — 2011-09-25
• Sharing properties — 2009-11-11
• Akin — 2008-08-05
• Comparable — 2007-08-09
• Akin — 2006-07-27
• Analogous — 2005-07-05
• Like — 2003-10-19