original: Serbian ruler Stefan Nemanja begins his sole reign.
simplifications: Stefan Nemanja starts his reign of Sibera. Stefan Nemanja becomes the sole ruler of Serbia. So begins the reign of Serb ruler Stefan Nemanja. Stefan Nemanja started his reign of Serbia. Serbian ruler Stefan Nemanja begins his single reign. Stefan Nemanja began his reign of Serbia. Stefan Nemanja starts his rule over Serbia. Serbian leader Stefan Nemanja reigns alone. Stefan Namanja is a serbian ruler starting his reign. Serbian ruler Stefan Nemanja actually starts his only reign.