what are all the groups/parties?
russian social democratic party, socialist-revolutionary party, labour group, progressist party, constitutional democratic party (kadets), non-russian national groups, centre party, octobrist party, nationalists, rightists
of those, which parties/groups hold second duma seats?
russian social democratic party, socialist-revolutionary party, labour group, progressist party, constitutional democratic party (kadets), octobrist party, nationalists, rightists
of those, which group/party has the most second duma seats?
labour group