user: ### NOW ANSWER:
Question: How many years did Aivaras Kvedarauskas Juozas Spelveris participate in the men's doubles?
Columns: ['Year', 'Mens singles', 'Womens singles', 'Mens doubles', 'Womens doubles', 'Mixed doubles']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1963.0, 'Juozas Kriščiūnas', 'Regina Šemetaitė', 'Juozas Kriščiūnas Povilas Tamošauskas', 'Jolanta Kazarinaitė Aurelija Kostiuškaitė', 'Juozas Kriščiūnas Jolanta Kazarinaitė']
SQL:

assistant: SELECT COUNT("Year") FROM "Table" WHERE "Mens doubles" = 'Aivaras Kvedarauskas Juozas Spelveris';