user: Question: Name the Rank of Rank Mountain Peak of Crested Butte PB?
Columns: ['Rank', 'Mountain Peak', 'Subrange', 'Elevation', 'Prominence', 'Isolation']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Castle Peak NGS', 'Elk Mountains', '4352.200 = 14,279feet 4352m', '0720.852 = 2,365feet 721m', '00033.71 = 20.9miles 33.7km']
SQL:

assistant: SELECT "Rank" FROM "Table" WHERE "Mountain Peak" = 'Crested Butte PB';