Complex sentence: On December 4,2009, the Zoo Sauvage de St-Félicien female Polar Bear, Aisaqvaq gave birth to two polar bear cubs, which is the first time that a Canadian zoo experienced the birth of twin polar bears.
Split into simpler sentences: On December 4,2009, the polar bear, Aisaqvaq gave birth to two cubs. This was the first time a Canadian zoo experienced the birth of twin polar bears.