De acordo com a pesquisa de fevereiro de 2009 da Corporate Research Associates que relatou 31% liberais, que porcentagem alinhou com o partido Progressista-Conservador?
CREATE TABLE table_name_63 (prog_cons VARCHAR, dates VARCHAR, polling_firm VARCHAR, liberal VARCHAR)
SELECT prog_cons FROM table_name_63 WHERE polling_firm = "corporate research associates" AND liberal = "31%" AND dates = "february 2009"