Complex sentence: Cockburn is engaged to be married to her fellow-Olympian, former training partner Mathieu Turgeon and cousin to Michael Hatley, second cousin to Bethanie Daniel Hatley.
Split into simpler sentences: Cockburn is engaged to be married to her fellow-Olympian, former training partner Mathieu Turgeon. Karen is the cousin of Michael Hatley, and second cousin to Bethanie Daniel Hatley.