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:
| Party | First Duma | Second Duma | Third Duma | Fourth Duma |
| --- | --- | --- | --- | --- |
| Russian Social Democratic Party | 18 (Mensheviks) | 47 (Mensheviks) | 19 (Bolsheviks) | 15 (Bolsheviks) |
| Socialist-Revolutionary Party | – | 37 | – | – |
| Labour group | 136 | 104 | 13 | 10 |
| Progressist Party | 27 | 28 | 28 | 41 |
| Constitutional Democratic Party (Kadets) | 179 | 92 | 52 | 57 |
| Non-Russian National Groups | 121 | – | 26 | 21 |
| Centre Party | – | – | – | 33 |
| Octobrist Party | 17 | 42 | 154 | 95 |
| Nationalists | 60 | 93 | 26 | 22 |
| Rightists | 8 | 10 | 147 | 154 |
| TOTAL | 566 | 453 | 465 | 448 |
Question:
how many parties were represented in the third duma?
Answer:
8