paragraph_text: The most important river in Thuringia is the Saale (a tributary of the Elbe) with its tributaries Unstrut, Ilm and Weiße Elster, draining the most parts of Thuringia and the Werra (the headwater of the Weser), draining the south-west and west of the Land. Furthermore, some small parts on the southern border are drained by tributaries of the Main (a tributary of the Rhine). There are no large natural lakes in Thuringia, but it does have some of Germany's biggest dams including the Bleiloch Dam and the Hohenwarte Dam at Saale river same as the Leibis-Lichte Dam and the Goldisthal Pumped Storage Station within the Highland. Thuringia is Germany's only state without connection to navigable waterways.

paragraph_text: The Oskondaga River is a river in Thunder Bay District in Northwestern Ontario, Canada. It is in the Great Lakes Basin and is a left tributary of the Shebandowan River. The river valley is paralleled by Ontario Highway 17, at this point part of the Trans-Canada Highway; and by both the Canadian Pacific Railway transcontinental main line, still in operation, and the Canadian National Railway Graham Subdivision main line, originally built as part of the National Transcontinental Railway, now abandoned.

paragraph_text: The Mosha () is a river in Plesetsky and Nyandomsky Districts of Arkhangelsk Oblast in Russia. It is a right tributary of the Onega River. It is long, and the area of its basin . The main tributaries of the Mosha are Iksa River (left), Lim River (right), Lepsha River (right), and Lelma River (left). As a matter of fact, the longest tributary of the Mosha, the Lepsha, is longer than the Mosha itself.

paragraph_text: The Chilako River is a tributary of the Nechako River, one of the main tributaries of the Fraser River, in the Canadian province of British Columbia. It flows through the Nechako Plateau.

paragraph_text: The Libby River is a river in the town of Scarborough, Maine, in the United States. It is tidal in its lower reaches, and it is a tributary of the Scarborough River, joining it just above that river's mouth at the Atlantic Ocean.

paragraph_text: The South Branch of the Souhegan River is a river located in northern Massachusetts and southern New Hampshire in the United States. It is a tributary of the Souhegan River, which flows to the Merrimack River and ultimately to the Gulf of Maine.

paragraph_text: The Soyana () is a river in Primorsky and Mezensky Districts of Arkhangelsk Oblast in Russia. It is a left tributary of the Kuloy River. It is long, and the area of its basin . The main tributaries of the Soyana are the Nyrzanga (right) and the Telsa (left).

paragraph_text: The Pakhra River () is a river in Moscow Oblast and the city of Moscow, Russia, a right tributary of the Moskva River. It is 135 km in length. The area of its basin is 2580 km². The Pakhra River freezes up in November–December and stays under the ice until the late March–April. Main tributaries: Mocha, Desna. Gorki Leninskiye and Podolsk stand on the Pakhra River.

paragraph_text: Kilmez River (; ) is a river in Udmurtia and Kirov Oblast in Russia, a left tributary of the Vyatka River. The river is long, and the area of its drainage basin is . The Kilmez freezes up in November and remains icebound until the second half of April. Its main tributaries are the Lumpun, Loban, and Vala rivers.

paragraph_text: The Großer Plöner See ("Great Plön Lake") or Lake Plön ("Plöner See", ) is the largest lake (30 km²) in Schleswig-Holstein, Germany. It is located near the town of Plön. Its main tributary, as well as its main outflow, is the River Schwentine.

paragraph_text: Wiesent is a river located in Bavaria, Germany. It is a right tributary of the river Regnitz. It is the main river of the Franconian Switzerland region, rising near the village Steinfeld. It flows through the towns Hollfeld, Muggendorf and Ebermannstadt, and joins the Regnitz in Forchheim.

paragraph_text: The Salmon Falls River is a tributary of the Piscataqua River in the U.S. states of Maine and New Hampshire. It rises at Great East Lake, Newichawannock Canal, and Horn Pond and flows south-southeast for approximately , forming the border between York County, Maine, and Strafford County, New Hampshire.

paragraph_text: The continent's cultural and ethnic outlook has its origin with the interaction of indigenous peoples with European conquerors and immigrants and, more locally, with African slaves. Given a long history of colonialism, the overwhelming majority of South Americans speak Portuguese or Spanish, and societies and states commonly reflect Western traditions.

paragraph_text: The Paute River is a river of Ecuador. It is a tributary of the Santiago River, which is a tributary of the Amazon River. The Paute Dam is located on the river.

paragraph_text: The Tebicuary River (Spanish: Río Tebicuary), a tributary of Paraguay River is a river in Paraguay. Located in the southwestern part of that country, it flows eastwards discharging to Paraguay River about 45 km south of Formosa and 30 km north of Pilar.

paragraph_text: The White River is an American two-forked river that flows through central and southern Indiana and is the main tributary to the Wabash River. Via the west fork, considered to be the main stem of the river by the U.S. Board on Geographic Names, the White River is long. Indiana's capital, Indianapolis, is located on the river.

paragraph_text: The Paraguay River (Río Paraguay in Spanish, Rio Paraguai in Portuguese, Ysyry Paraguái in Guarani) is a major river in south-central South America, running through Brazil, Bolivia, Paraguay and Argentina. It flows about from its headwaters in the Brazilian state of Mato Grosso to its confluence with the Paraná River north of Corrientes and Resistencia.

paragraph_text: Ansbach (; ) is a city in the German state of Bavaria. It is the capital of the administrative region of Middle Franconia. Ansbach is southwest of Nuremberg and north of Munich, on the Fränkische Rezat (Rezat River), a tributary of the Main river. In 2004, its population was 40,723.

paragraph_text: Wilkins Runway is a single runway aerodrome operated by Australia, located on upper glacier of the ice sheet Preston Heath, Budd Coast, Wilkes Land, on the continent of Antarctica, but southeast of the actual coast. It is named after Sir Hubert Wilkins, a pioneer of Antarctic aviation and exploration.

paragraph_text: The Rivière aux Mélèzes (also known as the Larch River and in Inuktitut as Kuuvik) is a river in Nunavik, Quebec, Canada. It forms the western part of the large basin of the Koksoak River. The other main tributary of the Koksoak is the Caniapiscau River, to the south.

Question: Who explored the mainland of the continent on which the river that the Tebicuary River is a tributary of is located?
Answer: European conquerors