Historical clue formulations

• Stravinsky and Sikorsky — 2011-11-24
• Composer Stravinsky and others — 2011-08-10
• Sikorsky and Stravinsky — 2008-01-10
• Stravinsky and others — 2007-12-23
• Sikorsky and others — 2006-07-12
• Hockey's Kravchuk and Korolev — 2006-05-04
• Sikorsky et al. — 2006-04-06
• Stravinsky and others — 2005-12-04
• Stravinsky et al. — 1998-07-07
• Choreographer Moiseyev et al. — 1994-09-25
• Stravinsky and others — 1994-07-28