CREATE TABLE table_57513 ("Date of Issue" CLOB, "Theme" CLOB, "Design" CLOB, "Illustration" CLOB, "Paper Type" CLOB, "First Day Cover Cancellation" CLOB)

What is the Date of Issue with a Theme with mental health?
SELECT "Date of Issue" FROM table_57513 WHERE "Theme" = 'mental health'
SELECT "Date of Issue" FROM "table_57513" WHERE "Theme" = 'mental health'