Complex sentence: An example is Ulupo heiau in Kailua on Oahu, which is said to have been built by the menehune, that is, a long time ago, and is thought to have been used first as an agricultural heiau and later as a luakini.
Split into simpler sentences: An example is Ulupo heiau in Kailua on Oahu, which is said to have been built by the "menehune," that is, a long time ago. It is thought to have been used first as an agricultural heiau and later as a luakini.