CREATE TABLE table_35784 ("Polling Firm" TEXT, "Date of Polling" TEXT, "Link" TEXT, "Liberal" FLOAT, "Green" FLOAT)

What is the link for january 31 february 3, 2011?
SELECT "Link" FROM table_35784 WHERE "Date of Polling" = 'january 31 – february 3, 2011'
SELECT "Link" FROM "table_35784" WHERE "Date of Polling" = 'january 31 – february 3, 2011'