CREATE TABLE table_name_2 (date_of_polling VARCHAR2, liberal VARCHAR2, polling_firm VARCHAR2, green VARCHAR2)

On what date of polling was the Polling Firm forum research with 7 green and less than 30 liberals?
SELECT date_of_polling FROM table_name_2 WHERE polling_firm = "forum research" AND green = 7 AND liberal < 30
SELECT "date_of_polling" FROM "table_name_2" WHERE "forum research" = "polling_firm" AND "green" = 7 AND "liberal" < 30