CREATE TABLE table_71612 ("Date" TEXT, "Company" TEXT, "Business" TEXT, "Country" TEXT, "Value  (  USD  ) " TEXT)

What company has an unknown date and is an energy business?
SELECT "Company" FROM table_71612 WHERE "Business" = 'energy' AND "Date" = 'unknown'
SELECT "Company" FROM "table_71612" WHERE "Business" = 'energy' AND "Date" = 'unknown'