Historical clue formulations

• ___ ease — 2010-06-03
• ___ ease — 2008-02-27
• ___ ease — 2005-11-27
• ___ ease — 2004-11-19
• ___ ease — 2002-11-30
• ___ ease — 2000-09-17
• ___ ease — 1998-10-31
• ___ ease — 1998-03-11