user: Question: What is the economy when the strike rate is 54.0?
Columns: ['Player', 'Team', 'Matches', 'Overs', 'Wickets', 'Economy Rate', 'Average', 'Strike Rate', 'BBI', 'BBM']
Types: ['text', 'text', 'real', 'text', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Makhaya Ntini', 'Warriors', 4.0, '152.4', 24.0, '2.18', '13.91', '38.1', '6/85', '9/109']
SQL:

assistant: SELECT "Economy Rate" FROM "Table" WHERE "Strike Rate" = '54.0';