Complex sentence: The remaining 5% is owned by Mineral Resources Enga (MRE), which is owned by the Enga Provincial Government, the Papua New Guinea National Government and Porgera Landowners.
Split into simpler sentences: The remaining 5% is owned by Mineral Resources Enga. Mineral Resourese Enga (MRE) is owned by the Enga Provincial Government, the Papua New Guinea National Government and Porgera Landowners.