user: Question: How many different Leagues had average attendance of 3589?
Columns: ['Year', 'Division', 'League', 'Regular Season', 'Playoffs', 'Open Cup', 'Avg. Attendance']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'real']
Sample row: [1994.0, 3.0, 'USISL', '7th, Midwest', 'Did not qualify', 'Did not enter', 67.0]
SQL:

assistant: SELECT COUNT("League") FROM "Table" WHERE "Avg. Attendance" = 3589.0;