user: Question: What is the link for January 31 – February 3, 2011?
Columns: ['Polling Firm', 'Date of Polling', 'Link', 'Liberal', 'Green']
Types: ['text', 'text', 'text', 'real', 'real']
Sample row: ['Angus Reid', 'October 4–5, 2011', 'PDF', 37.0, 3.0]
SQL:

assistant: SELECT "Link" FROM "Table" WHERE "Date of Polling" = 'January 31 – February 3, 2011';