CREATE TABLE table_42926 ("Ecosystem" TEXT, "Date of issue" TEXT, "Place of issue" TEXT, "No. stamps in sheet" FLOAT, "Face Value" TEXT, "Printer" TEXT)

On what date were sheets issued in Tallahassee, Florida?
SELECT "Date of issue" FROM table_42926 WHERE "Place of issue" = 'tallahassee, florida'
SELECT "Date of issue" FROM "table_42926" WHERE "Place of issue" = 'tallahassee, florida'