user: Question: What's the GFL Premiership when the home ground was Leopold Memorial Park?
Columns: ['Club', 'Nickname', 'Location', 'Home Ground', 'GFL Premierships', 'Years in GFL']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Bell Park', 'Dragons', 'Bell Park, Victoria', 'Hamlyn Park', '1984, 1991, 2003, 2011', '1979-']
SQL:

assistant: SELECT "GFL Premierships" FROM "Table" WHERE "Home Ground" = 'Leopold Memorial Park';