user: ### NOW ANSWER:
Question: What is the identifier that has 50,000 watts of power?
Columns: ['City of license', 'Identifier', 'Frequency', 'Power', 'Class', 'RECNet']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Attawapiskat', 'CBCA-FM', '101.5 FM', '34 s watt', 'A1', 'Query']
SQL:

assistant: SELECT "Identifier" FROM "Table" WHERE "Power" = '50,000 watts';