user: ### NOW ANSWER:
Question: Which school's nationality was United States when its pick was 595?
Columns: ['Round', 'Pick', 'Player', 'Nationality', 'School']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1', '16 (for Frank Catalanotto )', 'Kevin Ahrens (SS)', 'United States', 'Memorial High School']
SQL:

assistant: SELECT "School" FROM "Table" WHERE "Nationality" = 'United States' AND "Pick" = '595';