Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Polling Firm | Date of Polling | Link | Liberal | Green |
| --- | --- | --- | --- | --- |
| Angus Reid | October 4–5, 2011 | PDF | 37.0 | 3.0 |
| EKOS | October 3–5, 2011 | PDF | 37.7 | 5.9 |
| Forum Research | October 4, 2011 | HTML | 37.0 | 3.0 |
| Angus Reid | October 3–4, 2011 | PDF | 33.0 | 5.0 |
| Abacus Data | October 3–4, 2011 | HTML | 37.0 | 4.0 |
| EKOS | October 2–4, 2011 | PDF | 39.0 | 6.6 |
| Nanos Research | October 2–3, 2011 | PDF | 40.1 | 2.8 |
| EKOS | October 2–3, 2011 | PDF | 39.1 | 6.0 |
| Nanos Research | October 1–3, 2011 | PDF | 37.7 | 2.1 |
| Ipsos Reid | September 30 – October 3, 2011 | PDF | 41.0 | 3.0 |
| Nanos Research | September 30 – October 2, 2011 | PDF | 35.9 | 1.2 |
| EKOS | September 29 – October 2, 2011 | PDF | 37.8 | 7.3 |
| Nanos Research | September 29 – October 1, 2011 | PDF | 36.5 | 1.9 |
| Nanos Research | September 28–30, 2011 | PDF | 38.0 | 1.8 |
| Angus Reid | September 28–30, 2011 | PDF | 33.0 | 6.0 |
| Leger Marketing | September 28–29, 2011 | PDF | 32.0 | 5.0 |
| Nanos Research | September 28–29, 2011 | PDF | 37.7 | 2.0 |
| Environics | September 26–28, 2011 | HTML | 35.0 | 3.0 |
| Abacus Data | September 23–25, 2011 | PDF | 33.0 | 6.0 |
| EKOS | September 21–25, 2011 | PDF | 34.9 | 7.6 |
| Forum Research | September 22–23, 2011 | HTML | 35.0 | 5.0 |
| Angus Reid | September 13–15, 2011 | HTML | 32.0 | 6.0 |
| Leger Marketing | September 12–15, 2011 | PDF | 33.0 | 5.0 |
| Abacus Data | September 9–12, 2011 | HTML | 32.0 | 6.0 |
| Nanos Research | September 10–11, 2011 | PDF | 38.1 | 2.7 |
| Ipsos Reid | September 7–11, 2011 | HTML | 38.0 | 1.0 |
| Harris-Decima | August 25 – September 4, 2011 | HTML | 40.0 | 6.0 |
| Nanos Research | August 30 – September 1, 2011 | PDF | 31.9 | 4.1 |
| Forum Research | August 29–30, 2011 | HTML | 30.0 | 7.0 |
| Angus Reid | August 25–28, 2011 | PDF | 31.0 | 6.0 |
| Nanos Research | August 10–13, 2011 | PDF | 37.6 | 3.4 |
| Ipsos Reid | July 29 – August 4, 2011 | HTML | 36.0 | 3.0 |
| Forum Research | July 27–28, 2011 | HTML | 28.0 | 7.0 |
| Ipsos Reid | June 7 – July 7, 2011 | HTML | 31.0 | 5.0 |
| Forum Research | June 21–22, 2011 | HTML | 26.0 | 8.0 |
| Ipsos Reid | May 17 – June 9, 2011 | HTML | 34.0 | 6.0 |
| Nanos Research | May 14–15, 2011 | PDF | 34.0 | 5.0 |
| Nanos Research | March 8–11, 2011 | PDF | 35.0 | 4.0 |
| Nanos Research | January 31 – February 3, 2011 | PDF | 39.0 | 5.0 |
| Ipsos Reid | January 20, 2011 | HTML | 35.0 | 9.0 |
| Ipsos Reid | November 18, 2010 | HTML | 32.0 | 7.0 |
| Angus Reid | September 28, 2010 | PDF | 29.0 | 8.0 |
| Ipsos Reid | August 21, 2010 | HTML | 35.0 | 11.0 |
| Ipsos Reid | June 19, 2010 | HTML | 37.0 | 11.0 |
| Nanos Research | February 9–10, 2010 | PDF | 41.4 | 7.9 |
| Ipsos Reid | December 13, 2009 | HTML | 38.0 | 10.0 |
| Angus Reid | December 4, 2009 | PDF | 27.0 | 11.0 |
| Nanos Research | October 24–25, 2009 | PDF | 36.6 | 9.8 |
| Environics | October 2009 | HTML | 32.0 | 11.0 |
| Environics | June 2009 | HTML | 44.0 | 8.0 |
| Environics | April 2009 | HTML | 44.0 | 11.0 |
| Environics | January 2009 | HTML | 45.0 | 11.0 |
| Environics | November 2008 | HTML | 35.0 | 13.0 |
| Environics | June 2008 | HTML | 41.0 | 12.0 |
| Environics | March 2008 | HTML | 38.0 | 12.0 |
| Environics | January 2008 | HTML | 45.0 | 2.0 |
| Environics | November 2007 | HTML | 44.0 | 3.0 |
| Election 2007 | October 10, 2007 | HTML | 42.3 | 8.0 |
Question:
On what date of polling was the Polling Firm forum research with 7 green and less than 30 liberals?
Answer:
July 27–28, 2011