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:
| Sail | Yacht | Syndicate | Yacht Club | Nation |
| --- | --- | --- | --- | --- |
| USA-9 | Jayhawk | America 3 Foundation | San Diego Yacht Club | United States |
| USA-18 | Defiant | America 3 Foundation | San Diego Yacht Club | United States |
| USA-23 | America 3 | America 3 Foundation | San Diego Yacht Club | United States |
| USA-28 | Kanza | America 3 Foundation | San Diego Yacht Club | United States |
| USA-11 | Stars & Stripes | Team Dennis Conner | San Diego Yacht Club | United States |
Question:
Which Nation has the USA-18 sail?
Answer:
United States