user: Question: How many Premierships have Nicknamed of kangaroos?
Columns: ['Club', 'Nickname', 'Years in Competition', 'No. of Premierships', 'Premiership Years']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['Beulah', 'Blues', '1997-', 5.0, '2000, 2003-04-05, 2010']
SQL:

assistant: SELECT SUM("No. of Premierships") FROM "Table" WHERE "Nickname" = 'kangaroos';