user: Question: WHAT YEAR HAS A SILVER FOR Matthias Merz?
Columns: ['Year', 'Gold', 'Silver', 'Bronze', 'Notes']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1962.0, 'Magne Lystad', 'Bertil Norman', 'Sivar Nordström', '16.5km, 13controls (individual event)']
SQL:

assistant: SELECT "Year" FROM "Table" WHERE "Silver" = 'Matthias Merz';