Complex sentence: Utica was known as: "The radio capital of the world", due to manufacturing by General Electric, who in the 1970s employed over 8,000 workers in the area.
Split into simpler sentences: Utica was known as: "The radio capital of the world", which were made by GE. The city once had a population of 298,500 company like GE in the 1970's, employed over 8,000 workers in the area.