Complex sentence: The Muirfield Seamount is a submarine mountain located in the Indian Ocean approximately 130 kilometers (70 nautical miles) southwest of the Cocos (Keeling) Islands (an Australian territory), and therefore in Australia's Exclusive Economic Zone (EEZ).
Split into simpler sentences: The Muirfield Seamount is a submarine mountain located in the Indian Ocean approximately 130 kilometers (70 nautical miles) southwest of the Cocos (Keeling) Islands. The Cocos Islands are an Australian territory, and therefore the Muirfield Seamount is in Australia's Exclusive Economic Zone (EEZ).