user: Question: What is the class of the W267AN call sign?
Columns: ['Call sign', 'Frequency MHz', 'City of license', 'Facility ID', 'ERP W', 'Height m ( ft )', 'Class', 'FCC info']
Types: ['text', 'real', 'text', 'real', 'real', 'text', 'text', 'text']
Sample row: ['W267AG', 101.3, 'Salisbury, North Carolina', 67830.0, 38.0, 'm (ft)', 'D', 'FCC']
SQL:

assistant: SELECT "Class" FROM "Table" WHERE "Call sign" = 'W267AN';