(DONE in ELI-DL "Final1")

We need an additional property for a LegislativeProject, subproperty of  has participant organization, to describe the organization that submitted the project to the parliament (this could be the government, the President , the Senate, a group of MPs, a parliamentary committee or a group of citizens). Such organization should be somehow distinguished from other participant organizations and at the same time it cannot be considered as the responsible organizations, since parliamentary bodies are responsible for all stages.