user: Question: Which Frequency MHz is the highest one that has a City of license of Byron, GA?
Columns: ['Call sign', 'Frequency MHz', 'City of license', 'ERP W', 'Class', 'FCC info']
Types: ['text', 'real', 'text', 'real', 'text', 'text']
Sample row: ['WLPE', 91.7, 'Augusta, GA', 1150.0, 'A', 'FCC']
SQL:

assistant: SELECT MAX("Frequency MHz") FROM "Table" WHERE "City of license" = 'Byron, GA';