user: Question: What format is the link for the polling data for February 10–28, 2011?
Columns: ['Polling Firm', 'Date of Polling', 'Link', 'Progressive Conservative', 'Liberal', 'New Democratic']
Types: ['text', 'text', 'text', 'real', 'real', 'real']
Sample row: ['Corporate Research Associates', 'September 29 – October 3, 2011', 'HTML', 59.0, 16.0, 25.0]
SQL:

assistant: SELECT "Link" FROM "Table" WHERE "Date of Polling" = 'February 10–28, 2011';