user: Question: What Class has a Frequency of 90.1 FM?
Columns: ['City of license', 'Identifier', 'Frequency', 'Power', 'Class', 'RECNet']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Amos', 'CBFX-FM-3', '88.3 FM', '32,400 s watt', 'B', 'Query']
SQL:

assistant: SELECT "Class" FROM "Table" WHERE "Frequency" = '90.1 FM';