user: Question: What is the Official # that has a French title of "Pierre de lune"?
Columns: ['Official #', 'TF1 #', 'French title', 'English title', 'Air date (France)', 'Original Beechwood Bunny Tale / Source material']
Types: ['real', 'real', 'text', 'text', 'text', 'text']
Sample row: [27.0, 27.0, '"La fée Pirouette"', '"Fairy Violet"', '4 April 2007', 'Teleplay by Valérie Baranski']
SQL:

assistant: SELECT "Official #" FROM "Table" WHERE "French title" = '"Pierre de lune"';