user: Question: What Source has an Attack of 9,77%?
Columns: ['Source', 'Date', 'GERB', 'Attack', 'Blue Coalition']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Alpha Research', 'March', '19,2%', '6,8%', '4,9%']
SQL:

assistant: SELECT "Source" FROM "Table" WHERE "Attack" = '9,77%';