user: Question: When 4th, Great Lakes is the regular season what is the league?
Columns: ['Year', 'Division', 'League', 'Regular Season', 'Playoffs', 'Open Cup']
Types: ['real', 'real', 'text', 'text', 'text', 'text']
Sample row: [2005.0, 3.0, 'USL Second Division', '5th', 'Did not qualify', '1st Round']
SQL:

assistant: SELECT "League" FROM "Table" WHERE "Regular Season" = '4th, Great Lakes';