user: Question: What state is the radio station in that has a frequency of 90.1 FM and a city license in New Castle?
Columns: ['Call sign', 'Frequency', 'City of license', 'State', 'FCC info']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['WMBV', '91.9 FM', 'Dixons Mills', 'Alabama', 'FCC']
SQL:

assistant: SELECT "State" FROM "Table" WHERE "Frequency" = '90.1 FM' AND "City of license" = 'New Castle';