user: Question: What is Score, when Visitor is "Pittsburgh", and when Points is greater than 18?
Columns: ['Date', 'Visitor', 'Score', 'Home', 'Attendance', 'Record', 'Points']
Types: ['text', 'text', 'text', 'text', 'real', 'text', 'real']
Sample row: ['December 1', 'Pittsburgh', '4–4', 'Oakland', 2676.0, '5–12–5', 15.0]
SQL:

assistant: SELECT "Score" FROM "Table" WHERE "Visitor" = 'Pittsburgh' AND "Points" > 18.0;