user: Question: HOW MANY YEARS DID MENS DOUBLES PLAYER Heiki Sorge Meelis Maiste PLAY?
Columns: ['Year', 'Mens singles', 'Womens singles', 'Mens doubles', 'Womens doubles', 'Mixed doubles']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1965.0, 'Jüri Tarto', 'Helle-Mall Pajumägi', 'Jüri Tarto Raivo Kristianson', 'Hele-Mall Pajumägi Malle Mõistlik', 'Ülo Nurges Hele-mall Pajumägi']
SQL:

assistant: SELECT COUNT("Year") FROM "Table" WHERE "Mens doubles" = 'Heiki Sorge Meelis Maiste';