Complex sentence: It is believed that the species of tree in Kang Jin-gu, Sam In-li is about 500 years old, and measures 11.5m in height and 5.8m in circumference.
Split into simpler sentences: It is believed that the specimen in Kang Jin-gu, Sam In-li is about 500 years old. It measures 11.5m in height and 5.8m in circumference.