user: Question: Where is the first day cover cancellation for the 3 April 2008 IIHF World Championships, Quebec City stamp?
Columns: ['Date of Issue', 'Theme', 'Denomination', 'Design', 'Illustration', 'Printing Process', 'Paper Type', 'First Day Cover Cancellation']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['15 January 2008', 'Celebration', 'Permanent', 'Michael Zavacky, McMillan', 'Michael Zavacky, McMillan', 'Lithography in 7 colours', 'Lowe-Martin', 'Zeballos, BC']
SQL:

assistant: SELECT "First Day Cover Cancellation" FROM "Table" WHERE "Date of Issue" = '3 April 2008' AND "Theme" = 'IIHF World Championships, Quebec City';