user: Question: Which FA Cup goals have a League goals of 18, and a Club of Sheffield United?
Columns: ['Scorer', 'Club', 'League goals', 'FA Cup goals', 'League Cup goals', 'Total']
Types: ['text', 'text', 'text', 'real', 'real', 'real']
Sample row: ['John Hickton', 'Middlesbrough', '23', 4.0, 0.0, 27.0]
SQL:

assistant: SELECT "FA Cup goals" FROM "Table" WHERE "League goals" = '18' AND "Club" = 'Sheffield United';