Complex sentence: The WIN brand began from a sole free-to-air terrestrial television station in Wollongong, WIN-4, owned by Television Wollongong Transmissions (TWT).
Split into simpler sentences: The WIN brand began from a sole free-to-air terrestrial television station in Wollongong which had a callsign of'WIN'. The station was owned by Television Wollongong Transmissions (TWT).