Question: Which uninhabited coral atoll was Ramón Arnaud the governor of?

Context paragraphs:
Bokak Atoll: Bokak Atoll (Marshallese: Bokaak or Bok-ak , ) or Taongi Atoll is an uninhabited coral atoll in the Ratak Chain of the Marshall Islands, located in the North Pacific Ocean at .  Due to its relative isolation from the main islands in the group, Bokak has an undisturbed flora and fauna that has been allowed to exist in a pristine condition.

Perumal Par: Perumal Par, also known as Peremul Par, is an uninhabited coral atoll belonging to the Amindivi Subgroup of islands of the Union Territory of Lakshadweep, India.

Toke Atoll: Toke Atoll or Taka Atoll (Marshallese: Tōkā , ) is a small, uninhabited coral atoll in the Ratak Chain of the Marshall Islands.  It is one of the smaller atolls in the Marshalls and located at .  It is visited regularly by the residents of nearby Utirik Atoll.

Erikub Atoll: Erikub Atoll (Marshallese: Ādkup , ) is an uninhabited coral atoll of fourteen islands in the Pacific Ocean, located in the Ratak Chain of the Marshall Islands.  Its total land area is only 1.53 km² , but it encloses a lagoon with an area of 230 km² .  It is located slightly south of Wotje.

Ramón Arnaud: Captain Ramón Arnaud Vignon (1877–1916) was an officer in the Mexican Army and the last Mexican governor of Clipperton Island.

Clipperton Island: Clipperton Island (French: "Île de Clipperton" or "Île de la Passion "; Spanish: "Isla de la Pasión" ) is an uninhabited 6 km2 coral atoll in the eastern Pacific Ocean off the coast of Central America.  It is a minor overseas territory of France.

Hogsty Reef: Hogsty Reef is a uninhabited coral atoll located in the southern Bahamas.  It is located between Great Inagua (to the South) and Acklins Island (to the North).

North Keeling: North Keeling is a small, uninhabited coral atoll, approximately 1.2 km2 in area, about 25 km north of Horsburgh Island.  It is the northernmost atoll and island of the Australian territory of the Cocos (Keeling) Islands.  North Keeling comprises just one C-shaped island, a nearly closed atoll ring with a small opening into the lagoon, about 50 m wide, on the east side.  The lagoon is about 0.5 km2 in area.  The island is home to the only surviving population of the endemic, and endangered, Cocos buff-banded rail, as well as large breeding colonies of seabirds.  Since 1995, North Keeling Island and the surrounding sea to 1.5 km from shore have been within the Pulu Keeling National Park.

Atoll: An atoll ( , , , , or ), sometimes called a coral atoll, is a ring-shaped coral reef including a coral rim that encircles a lagoon partially or completely.  There may be coral islands/cays on the rim.  The coral of the atoll often sits atop the rim of an extinct seamount or volcano which has eroded or subsided partially beneath the water.  The lagoon forms over the volcanic crater or caldera while the higher rim remains above water or at shallow depths that permit the coral to grow and form the reefs.  For the atoll to persist, continued erosion or subsidence must be at a rate slow enough to permit reef growth upwards and outwards to replace the lost height.

Knox Atoll: Knox Atoll (Marshallese: Ņadikdik , ) is an uninhabited coral atoll of 18 islands in the Pacific Ocean, and is the southernmost atoll of the Ratak Chain of the Marshall Islands.  The total land area is only 0.98 km2 , but it encloses a largely sand-filled lagoon with an area of 3.42 km2 .  The atoll measures 11 km in length and is 2 km wide.  The largest islets, located on the western and northern sides, include Aelingeo, Nadikdik and Nariktal.  The atoll is separated by the Klee Passage from the southern point of Mili Atoll to which it was once connected.

Supporting paragraphs: Ramón Arnaud Clipperton Island
Answer: Clipperton Island