Complex sentence: The original city rights bill was lost in a large fire that swept through the city, reducing the city hall and the keep to rubble, but in the year 2006 a copy was given to the newly instated city council.
Split into simpler sentences: The original city rights bill was lost in a large fire that swept through the city, reducing the city hall and the keep to rubble. In 2006, however, a copy was given to the newly instated city council.