Complex sentence: On September 21st of 2005, Dunn announced he was leaving B105 and in 2006, he and Agro began to present the breakfast show on Sunshine Coast FM radio station "Zinc 96".
Split into simpler sentences: On September 21st of 2005, Dunn announced he was leaving B105. In 2006, Dunn and Agro present the breakfast show on Sunshine Coast FM radio station "Zinc 96".