Historical clue formulations

• Identical to — 2015-03-29
• Exactly like — 2011-09-11
• Interchangeable with, with "the" — 2009-04-30
• Just like — 2008-04-15
• Identical to — 2007-07-23
• Matching, with "the" — 2007-01-20
• Identical to — 2003-08-02