Historical clue formulations

• Title heroine of a Massenet opera — 2015-11-07
• Jules Massenet opéra comique — 2014-07-10
• Massenet opera — 2014-02-16
• Massenet opera — 2005-05-29
• Puccini's "___ Lescaut" — 2001-08-19
• Massenet opera — 1994-07-02
• Massenet opera — 1993-12-01