CREATE TABLE table_364 ("Date of Issue" TEXT, "Theme" TEXT, "Denomination" TEXT, "Design" TEXT, "Illustration" TEXT, "Printing Process" TEXT, "Paper Type" TEXT, "First Day Cover Cancellation" TEXT)

What denominations are the stamps with themes opera, l opold simoneau and pierrette alarie?
SELECT "Denomination" FROM table_364 WHERE "Theme" = 'Opera, Léopold Simoneau and Pierrette Alarie'
SELECT "Denomination" FROM "table_364" WHERE "Theme" = 'Opera, Léopold Simoneau and Pierrette Alarie'