Original sentence: WNTZ is a network of one main transmitter and four translator transmitters that serves residents in three television markets – Alexandria (the market that gets rated by Nielsen); the southernmost portion of the Monroe, Louisiana/El Dorado, Arkansas market (where the station's main transmitter tower is located); and the westernmost portion of the Jackson market(the location of Natchez, the station's city of license)
Edited sentence: WNTZ is a network of one main transmitter and four translator transmitters that serves residents in three television markets – Alexandria (the market that gets rated by Nielsen); the southernmost portion of the Monroe, Louisiana/El Dorado, Arkansas market (where the station's main transmitter tower is located); and the westernmost portion of the Jackson market (the location of Natchez, the station's city of license)