Historical clue formulations

• Gaston who wrote "The Phantom of the Opera" — 2023-10-12
• Gaston ___, "The Phantom of the Opera" novelist — 2020-01-19
• Gaston ___, Frenchman who wrote "The Phantom of the Opera" — 2017-09-30
• "The Phantom of the Opera" writer — 2012-08-11
• Gaston who wrote "The Phantom of the Opera" — 2011-09-23
• "The Phantom of the Opera" writer Gaston ___ — 2006-06-15
• "The Phantom of the Opera" author — 2005-06-04