Complex sentence: The Council of Ancients was the senior of the two halves of the republican legislative system, the Ancients were 250 members who could accept or reject laws put forward by the Council of Five Hundred ("Conseil des Cinq-Cents").
Split into simpler sentences: The Council of Ancients was the senior of the two halves of the republican legislative system. The Ancients were 250 members who could accept or reject laws put forward by the Council of Five Hundred ("Conseil des Cinq-Cents").