user: Question: How many League Cup goals correspond to 3 FA Cup Goals and a total over 15 for Chesterfield?
Columns: ['Scorer', 'Club', 'League goals', 'FA Cup goals', 'League Cup goals', 'Total']
Types: ['text', 'text', 'text', 'real', 'text', 'real']
Sample row: ['Dave Gwyther', 'Swansea City', '18', 7.0, '2', 27.0]
SQL:

assistant: SELECT "League Cup goals" FROM "Table" WHERE "Total" > 15.0 AND "FA Cup goals" = 3.0 AND "Club" = 'Chesterfield';