Complex sentence: Cummins was previously news presenter for "Weekend Sunrise" on the Seven Network, she left "Weekend Sunrise" in July 2008 and was replaced by Sharyn Ghidella.
Split into simpler sentences: Cummins was previously news presenter for "Weekend Sunrise" on the Seven Network. Cummins left "Weekend Sunrise" in July 2008 and was replaced by Sharyn Ghidella.