user: Question: Which nation is where rider Phillip Dutton from?
Columns: ['Nation', 'Rider', 'Horse', 'Cross Country Penalties', 'Total Penalties', 'Total Team Penalties', 'Team Rank']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['Germany', 'Peter Thomsen', 'The Ghost Of Hamish', '25.60', '98.90', '158.10', 1.0]
SQL:

assistant: SELECT "Nation" FROM "Table" WHERE "Rider" = 'Phillip Dutton';