user: Question: What percentages of social democratic correspond to a 5.5% left bloc?
Columns: ['Date Released', 'Polling institute', 'Socialist', 'Social Democratic', 'Peoples Party', 'Green-Communist', 'Left Bloc', 'Lead']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['February 20, 2005', 'Election Results', '45.0% 121 seats', '28.8% 75 seats', '7.2% 12 seats', '7.5% 14 seats', '6.4% 8 seats', '16.2%']
SQL:

assistant: SELECT "Social Democratic" FROM "Table" WHERE "Left Bloc" = '5.5%';