Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_2 (date_of_polling VARCHAR, liberal VARCHAR, polling_firm VARCHAR, green VARCHAR)
### Question:
On what date of polling was the Polling Firm forum research with 7 green and less than 30 liberals?
### Answer:
SELECT date_of_polling FROM table_name_2 WHERE polling_firm = "forum research" AND green = 7 AND liberal < 30