Question: What river is the river of  which Baron, Oklahoma is built on is a tributary of itself a tributary of?

Context paragraphs:
Big Skin Bayou: Big Skin Bayou, also known as Skin Bayou or Big Skin Creek, is a tributary of the Arkansas River located in Sequoyah County, Oklahoma.  It takes its name from the French word "skein" which are loose, tangled layers of yarn.  A large, colorful canebrake resembling yarn; formed a near impenetrable, natural wall near the mouth of the creek before it was cleared for farming.  French trappers and explorers named several of the major tributaries of the Arkansas River in Oklahoma; as it was once a part of the French Territory of Louisiana that was later the Louisiana Purchase.  At one time, there were large rock bluffs near Big Skin's confluence with the Arkansas (most of these bluffs were later destroyed to provide rock fill for the W.D. Mayo Lock and Dam).  The bluff on the south side (LeFLore County side) of the river and across from Big Skin's confluence was known as Swallow Rock, named for the birds that nested there and was the site of the old Fort Coffee.  The bluff on the north side of the river (Sequoyah County side) and west of Big Skin is known as Wilson Rock (on some maps listed as Wilson's Rock).  Both bluffs formed a natural wharf and served as historic steamboat landings and ferry crossings.  The cemetery at Wilson Rock contains the graves of local residents as well as some travelers that fell victim to the river over the years.  Tiana, the wife of the famed Texan Sam Houston was buried at Wilson Rock Cemetery for several years until she was moved to a cemetery near Fort Gibson.  Wilson Rock and Big Skin Bayou were also drop off points for several groups of Cherokees that were forced to relocate to that part of Oklahoma/Indian Territory on the Trail of Tears.  The relocated tribesmen that disembarked here would then follow the creek into the interior parts of Skin Bayou District where they settled.  Most of eastern Sequoyah County was included in the "Skin Bayou District" of Cherokee Nation, Indian Territory; which also took its name from the creek.

Poteau River: The Poteau River is a 141-mile (227 km) long river located in the U.S. states of Arkansas and Oklahoma.  It is the only river in Oklahoma that flows north and is the seventh largest river in the state.  It is a tributary of the Arkansas River, which itself is a tributary of the Mississippi River.

Kiamichi River: The Kiamichi River is a river in southeastern Oklahoma.  A tributary of the Red River, its headwaters rise on Pine Mountain in the Ouachita Mountains near the Arkansas border.  From its source in LeFlore County, Oklahoma it flows approximately 177 mi to its confluence with the Red River south of Hugo, Oklahoma.

Baron, Oklahoma: Baron is an unincorporated community in rural Adair County, Oklahoma, United States, located along U.S. Route 59 between Westville and Stilwell.  It was built on the West Branch of the Baron Fork of the Illinois River, a tributary of the Arkansas River via the Illinois River.

Baron Fork of the Illinois River: The Baron Fork of the Illinois River is a tributary of the Illinois River in the U.S. states of Arkansas and Oklahoma.  The stream is sometimes called Baron Fork River, Barren Fork Creek or simply Barren Fork.

Little River (Red River): The Little River is a tributary of the Red River, with a total length of 217 mi , 130 mi in southeastern Oklahoma and 87 mi in southwestern Arkansas.  in southeastern Oklahoma and southwestern Arkansas in the United States.  Via the Red, it is part of the watershed of the Mississippi River.  Six large reservoirs impound the Little River and its tributaries.  The drainage basin of the river totals 4,204 sqmi , 2,204 sqmi in Oklahoma and 2,036 sqmi in Arkansas.  The Little River and its upper tributaries are popular for recreational canoeing and kayaking.

Muddy Boggy Creek: Muddy Boggy River, also known as the Muddy Boggy Creek, is a 175 mi river in south central Oklahoma.  a major tributary of the Red River in south central Oklahoma, is formed by the confluence of Muddy Boggy Creek and Clear Boggy Creek.  Both streams converge at a location known as River Mile 24 in Pontotoc County, Oklahoma.  It is a major tributary of the Red River.  The river is inhabited by over one hundred species of fish.

Arkansas River: The Arkansas River is a major tributary of the Mississippi River.  It generally flows to the east and southeast as it traverses the U.S. states of Colorado, Kansas, Oklahoma, and Arkansas.  The river's source basin lies in the western United States in Colorado, specifically the Arkansas River Valley, where the headwaters derive from the snowpack in the Sawatch and Mosquito mountain ranges.  It then flows east into the Midwest via Kansas, and finally into the South through Oklahoma and Arkansas.

Malleco River: Malleco River is a river in Malleco Province, La Araucanía Region, southern Chile.  It rises in the western slopes of the Andes, within the Tolhuaca National Park and near Tolhuaca Volcano.  The river is a major tributary to the Vergara River, which is a tributary of the Biobío River.  The Malleco Viaduct built in 1890 is the main landmark of the river.

Willow River (St. Croix River): The Willow River is a 61.1 mi river in St. Croix County, Wisconsin, United States, and a tributary of the St. Croix River.  Its source is in southern Polk County east of the village of Clear Lake.  The river at one time flowed unobstructed into the lower St. Croix River in between Hudson and North Hudson ( ).  But a dam was built to block off its mouth, a narrow channel was cut above the dam to the St. Croix River, the channel was dammed, and a mill was built to exploit the head of water that the two dams created.  Subsequently, the Willow River Power Co. built a hydroelectric facility to utilize the same head of water, but the head was substantially decreased when the United States built the Red Wing Dam 30 miles downstream on the Mississippi River.

Supporting paragraphs: Baron, Oklahoma Arkansas River
Answer: the Mississippi River