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 | Netherlands | 20 | 9 | 0 | 29 |
| 2 | Italy | 10 | 15 | 3 | 28 |
| 3 | Belgium | 1 | 2 | 6 | 9 |
| 4 | Spain | 1 | 1 | 13 | 15 |
| 5 | Great Britain | 0 | 2 | 0 | 2 |
| 6 | Germany | 0 | 1 | 7 | 8 |
| 7 | Greece | 0 | 1 | 0 | 1 |
| 7 | Russia | 0 | 1 | 0 | 1 |
| 9 | Sweden | 0 | 0 | 2 | 2 |
| 10 | France | 0 | 0 | 1 | 1 |
Question:
number of gold medals earned by the netherlands and italy
Answer:
30