CREATE TABLE table_70003 ("Unit" CLOB, "Reactortype" CLOB, "Net capacity" CLOB, "Gross capacity" CLOB, "Construction started" CLOB, "Electricity Grid" CLOB, "Commercial Operation" CLOB, "Shutdown" CLOB)

Which Commercial Operation has both a Gross Capacity of 417 mw and an Electricity Grid 27.12.1971?
SELECT "Commercial Operation" FROM table_70003 WHERE "Gross capacity" = '417 mw' AND "Electricity Grid" = '27.12.1971'
SELECT "Commercial Operation" FROM "table_70003" WHERE "Electricity Grid" = '27.12.1971' AND "Gross capacity" = '417 mw'