CREATE TABLE table_name_22 (attendance INTEGER, date VARCHAR(255), report VARCHAR(255), score VARCHAR(255))
What is the total attendance with a Report of sd.hr, and a Score of 3–1, and a Date of 14 apr 2001?
    
SQL: SELECT SUM(attendance) FROM table_name_22 WHERE report = "sd.hr" AND score = "3–1" AND date = "14 apr 2001"