user: Question: What is the sum of atteNdaNce for H/A values of "N"?
Columns: ['Date', 'Round', 'Opponents', 'H / A', 'Result F–A', 'Attendance']
Types: ['text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['26 October 2005', 'Round 3', 'Barnet', 'H', '4–1', 43673.0]
SQL:

assistant: SELECT SUM("Attendance") FROM "Table" WHERE "H / A" = 'N';