Complex sentence: The BBC broadcast a "Democracy Day" on 20 January 2015 to coincide with the 750th anniversary of Montfort's Parliament, in partnership with the House of Commons and the House of Lords, including broadcasts from inside the Palace of Westminster.
Split into simpler sentences: The BBC broadcast a "Democracy Day" on 20 January 2015 to coincide with the 750th anniversary of Montfort's Parliament. It was broadcast in partnership with the House of Commons and the House of Lords, including broadcasts from inside the Palace of Westminster.