user: Question: In silver bow county, montana, when the capicity is more than 45 tons, what's the highest rank found?
Columns: ['Rank', 'Mine', 'County and State', 'Operator', 'Source of copper', 'Capacity (thousands of metric tons)']
Types: ['real', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'Morenci', 'Greenlee County, Arizona', 'Freeport-McMoRan', 'Copper ore, leached', 390.0]
SQL:

assistant: SELECT MAX("Rank") FROM "Table" WHERE "County and State" = 'silver bow county, montana' AND "Capacity (thousands of metric tons)" > 45.0;