user: Question: Which Class has a ERP W larger than 205, and a Frequency MHz smaller than 93.9, and a Call sign of K210CB?
Columns: ['Call sign', 'Frequency MHz', 'City of license', 'ERP W', 'Class', 'FCC info']
Types: ['text', 'real', 'text', 'real', 'text', 'text']
Sample row: ['K210CB', 89.9, 'Broken Bow, Nebraska', 250.0, 'D', 'FCC']
SQL:

assistant: SELECT "Class" FROM "Table" WHERE "ERP W" > 205.0 AND "Frequency MHz" < 93.9 AND "Call sign" = 'K210CB';