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:
| Rank | Nation | Gold | Silver | Bronze | Total |
| --- | --- | --- | --- | --- | --- |
| 1 | South Korea | 7 | 6 | 1 | 14 |
| 2 | China | 5 | 5 | 2 | 12 |
| 3 | Japan | 3 | 1 | 5 | 9 |
| 4 | Hong Kong | 2 | 3 | 5 | 10 |
| 5 | Chinese Taipei | 2 | 0 | 0 | 2 |
| 6 | Iran | 1 | 3 | 2 | 6 |
| 7 | Thailand | 1 | 2 | 3 | 6 |
| 8 | Malaysia | 1 | 1 | 5 | 7 |
| 9 | Kyrgyzstan | 1 | 0 | 0 | 1 |
| 10 | Kazakhstan | 0 | 1 | 0 | 1 |
| 10 | Uzbekistan | 0 | 1 | 0 | 1 |
| Total | Total | 23 | 23 | 23 | 69 |
Question:
how many teams won at least three bronze medals in this event?
Answer:
4