Complex sentence: The station was very popular with the younger demographics (12-24), one survey in 1961, (Pulse, Spring 1961) Ken Dee (Dockins) had 62% of the total radio audience during his afternoon show.
Split into simpler sentences: The station was very popular with the younger demographics (12-24). One survey in 1961, (Pulse, Spring 1961) Ken Dee (Dockins) had 62% of the total radio audience during his afternoon show.