user: Question: What's the name of the operator who has the Mission Complex mine and has a 2012 Cu Production (lbs) larger than 23.3?
Columns: ['Rank', 'Mine', 'County', 'Operator', 'Source of copper', '2012 Cu Production (lbs)']
Types: ['real', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'Morenci', 'Greenlee', 'Freeport-McMoRan', 'Copper-molybdenum ore, concentrated and leached', 632.0]
SQL:

assistant: SELECT "Operator" FROM "Table" WHERE "2012 Cu Production (lbs)" > 23.3 AND "Mine" = 'Mission Complex';