Table: royal_canadian_mint_coins_13
Columns: year
theme
artist
composition
mintage
issue_price

Question: What was the theme when the issue price was $508.95?
SQL: SELECT "theme" FROM royal_canadian_mint_coins_13 WHERE "issue_price" = '$508.95'

Question: What's the mintage when the theme was year of the rabbit?
SQL: SELECT "mintage" FROM royal_canadian_mint_coins_13 WHERE "theme" = 'year of the rabbit'

Question: What year was the year of the pig theme?
SQL: SELECT "year" FROM royal_canadian_mint_coins_13 WHERE "theme" = 'year of the pig'

Question: Who was the artist for the year of the snake?
SQL: SELECT "artist" FROM royal_canadian_mint_coins_13 WHERE "theme" = 'year of the snake'