Complex sentence: Narni is an ancient hilltown and "comune" of Umbria in central Italy, with 20,100 inhabitants according to the 2003 census; at an altitude of 240 m (787 ft), it overhangs a narrow gorge of the Nera River in the province of Terni.
Split into simpler sentences: Narni is an ancient hilltown and "comune" of Umbria, in central Italy, with 20,100 inhabitants, according to the 2003 census. At an altitude of 240 m (787 ft), it overhangs a narrow gorge of the Nera River in the province of Terni.