CREATE TABLE table_62323 ("Country" TEXT, "Builder" TEXT, "Location" TEXT, "Ship" TEXT, "Class / type" TEXT)

What is Country, when Builder is 'Sheerness Dockyard'?
SELECT "Country" FROM table_62323 WHERE "Builder" = 'sheerness dockyard'
SELECT "Country" FROM "table_62323" WHERE "Builder" = 'sheerness dockyard'