Complex sentence: Institutionally, he supports the Treaty establishing a Constitution for Europe, voted down in referendums in France and Netherlands in 2005, believing that it should be ratified by the member states without further negotiations or without excluding some of its provisions.
Split into simpler sentences: Institutionally, he supports the Treaty establishing a Constitution for Europe, voted down in referendums in France and Netherlands in 2005. He believes it should be ratified by the member states without further negotiations or without excluding some of its provisions.