user: Question: What is the Nation with 2012 as the year, and a Competition of Preseason, and a Result of W 0–3?
Columns: ['Year', 'Competition', 'Club', 'Nation', 'Result']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [2010.0, 'Preseason', 'Club Universidad de Guadalajara', 'Mexico', 'W 0–1']
SQL:

assistant: SELECT "Nation" FROM "Table" WHERE "Year" = 2012.0 AND "Competition" = 'Preseason' AND "Result" = 'W 0–3';