human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Year, Mens singles, Womens singles, Mens doubles, Womens doubles, Mixed doubles
###Question: How many years did aivaras kvedarauskas juozas spelveris participate in the men's doubles?
gpt
SELECT COUNT Year FROM table WHERE Mens doubles = Aivaras Kvedarauskas Juozas Spelveris