user: Question: How mAny WAtts hAs A ClAss of A, And A Frequency of 91.5 FM, And A City of license of Elkhart, Kansas?
Columns: ['Call sign', 'Frequency', 'City of license', 'Watts', 'Class']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['KANZ', '91.1 FM', 'Garden City, Kansas', 100000.0, 'C1']
SQL:

assistant: SELECT "Watts" FROM "Table" WHERE "Class" = 'A' AND "Frequency" = '91.5 FM' AND "City of license" = 'Elkhart, Kansas';