user: Question: Which Notes have a Competition of World Championships, and a Position of 2nd?
Columns: ['Year', 'Competition', 'Venue', 'Position', 'Notes']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [2007.0, 'European U23 Championships', 'Debrecen , Hungary', '9th', '63.74 m']
SQL:

assistant: SELECT "Notes" FROM "Table" WHERE "Competition" = 'World Championships' AND "Position" = '2nd';