Complex sentence: It was the capital of Fezzan region and is now capital of the Sabha municipality and has a population of 130,000 and the only city in the Sahara with more than 100,000 inhabitants.
Split into simpler sentences: It was the capital of Fezzan region and is now capital of the Sabha municipality and has a population of 130,000. It is the only city in the Sahara with more than 100,000 inhabitants.