user: Question: Which callsign has ERP W of 99 and a frequency of greater than 88.7MHz?
Columns: ['Call sign', 'Frequency MHz', 'City of license', 'ERP W', 'Class', 'FCC info']
Types: ['text', 'real', 'text', 'real', 'text', 'text']
Sample row: ['K208DQ', 89.5, 'Almont, Colorado', 16.0, 'D', 'FCC']
SQL:

assistant: SELECT "Call sign" FROM "Table" WHERE "Frequency MHz" > 88.7 AND "ERP W" = 99.0;