CREATE TABLE table_204_599 (id DECIMAL, "party" TEXT, "first duma" TEXT, "second duma" TEXT, "third duma" TEXT, "fourth duma" TEXT)

how long was the first duma on rigtists
SELECT "first duma" FROM table_204_599 WHERE "party" = 'rightists'
SELECT "first duma" FROM "table_204_599" WHERE "party" = 'rightists'