user: Question: What is the total attendance with a Report of SD.hr, and a Score of 3–1, and a Date of 14 Apr 2001?
Columns: ['Date', 'Competition', 'Ground', 'Score', 'Attendance', 'Report']
Types: ['text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['19 Sep 2000', '1. HNL', 'Poljud', '0–1', 17000.0, 'SD.hr']
SQL:

assistant: SELECT SUM("Attendance") FROM "Table" WHERE "Report" = 'SD.hr' AND "Score" = '3–1' AND "Date" = '14 Apr 2001';