Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
On what date of polling was the Polling Firm forum research with 7 green and less than 30 liberals?

### Inputs:
table_name: table, columns: ['Polling Firm', 'Date of Polling', 'Link', 'Liberal', 'Green']

### Response:
SELECT Date of Polling FROM table WHERE Polling Firm = forum research AND Green = 7 AND Liberal < 30