user: Question: Which club has played for 27 seasons at this level?
Columns: ['Clubs', 'Seasons at this level', 'Settlements', 'Season joined league', 'Position in 1960/1961']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Benfica', '28 seasons', 'Lisbon', '1934/1935', '1']
SQL:

assistant: SELECT "Clubs" FROM "Table" WHERE "Seasons at this level" = '27 seasons';