CREATE TABLE table_50641 ("Rank" FLOAT, "Company" CLOB, "Country" CLOB, "Industry" CLOB, "Revenue in USD" CLOB)

What is the rank of the petroleum company who has a revenue of $481.7 billion?
SELECT MIN("Rank") FROM table_50641 WHERE "Industry" = 'petroleum' AND "Revenue in USD" = '$481.7 billion'
SELECT MIN("Rank") FROM "table_50641" WHERE "Industry" = 'petroleum' AND "Revenue in USD" = '$481.7 billion'