Table: canada_post_stamps
Columns: date_of_issue
denomination
design
paper_type
first_day_cover_cancellation

Question: What's listed as the First Day Cover Cancellation with a Date of Issue of 13 June 2005?
SQL: SELECT "first_day_cover_cancellation" FROM canada_post_stamps WHERE "date_of_issue" = '13 june 2005'

Question: What's the First Day Cover Cancellation with Denomination of $0.50 and Date of Issue as 13 June 2005?
SQL: SELECT "first_day_cover_cancellation" FROM canada_post_stamps WHERE "denomination" = '$0.50' AND "date_of_issue" = '13 june 2005'

Question: What's the Denomination listed for the Date of Issue 12 April 2005?
SQL: SELECT "denomination" FROM canada_post_stamps WHERE "date_of_issue" = '12 april 2005'

Question: Which Paper Type has a Denomination of $0.50 and Date of Issue 4 February 2005?
SQL: SELECT "paper_type" FROM canada_post_stamps WHERE "denomination" = '$0.50' AND "date_of_issue" = '4 february 2005'

Question: What's the Date of Issue for Design of Katalin Kovats?
SQL: SELECT "date_of_issue" FROM canada_post_stamps WHERE "design" = 'katalin kovats'