Original sentence: Previous themes included: "Disaster & Emergency Preparedness" (2004), "Health & Wellness" (2005), "The Great Canadian Energy Challenge" (2006), and "Zero Waste Technology" (2007)
Edited sentence: Previous themes included: "Disaster & Emergency Preparedness" (2004), "Health & Wellness" (2005), "The Great Canadian Energy Challenge" (2006), "Zero Waste Technology" (2007), and "Natural Fibres" (2009)