user: Question: What is the highest rounD of Ian Cole, who playeD position D from the United States?
Columns: ['Round', 'Player', 'Position', 'Nationality', 'College/Junior/Club Team (League)']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Lars Eller', 'C', 'Denmark', 'Frölunda HC ( Swedish Elite League )']
SQL:

assistant: SELECT MAX("Round") FROM "Table" WHERE "Position" = 'D' AND "Nationality" = 'United States' AND "Player" = 'Ian Cole';