CREATE TABLE table_57515 ("Date of Issue" TEXT, "Theme" TEXT, "Design" TEXT, "Illustration" TEXT, "Paper Type" TEXT, "First Day Cover Cancellation" TEXT)

What is the Paper Type with a First Day Cover Cancellation with ottawa, on?
SELECT "Paper Type" FROM table_57515 WHERE "First Day Cover Cancellation" = 'ottawa, on'
SELECT "Paper Type" FROM "table_57515" WHERE "First Day Cover Cancellation" = 'ottawa, on'