With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: South America is home to a large river.
text_B: The Amazon River , usually abbreviated to Amazon -LRB- -LSB- ˈæməzɒn -RSB- or -LSB- ˈæməzən -RSB- Spanish and Amazonas -RRB- , in South America is the largest river by discharge volume of water in the world and according to some authors , the longest in length .. Spanish. Spanish language. South America. South America. largest river. List of rivers by discharge. discharge. Discharge ( hydrology ). longest in length. List of rivers by length. The headwaters of the Apurimac River on Nevado Mismi had been considered for nearly a century as the Amazon 's most distant source , until a 2014 study found it to be the Cordillera Rumi Cruz at the headwaters of the Mantaro River in Peru .. Apurimac River. Apurimac River. Nevado Mismi. Nevado Mismi. Mantaro River. Mantaro River. Peru. Peru. The Mantaro and Apurimac confluence , and with other tributaries form the Ucayali River , which in turn confluences with the Maranon River upstream of Iquitos , Peru , to form what countries other than Brazil consider to be the main stem of the Amazon .. Maranon. Maranon River. Ucayali. Ucayali River. Iquitos. Iquitos. Ucayali River. Ucayali River. Maranon River. Maranon River. Peru. Peru. main stem. main stem. Brazil. Brazil. Brazilians call this section the Solimoes River above its confluence with the Rio Negro to form what Brazilians call the Amazon at the Meeting of Waters -LRB- Encontro das Aguas -RRB- at Manaus , the river 's largest city .. Rio Negro. Rio Negro ( Amazon ). Manaus. Manaus. Solimoes River. Solimoes River. Meeting of Waters. Meeting of Waters. At an average discharge of about 209000 m3 / s -- approximately 6591 km3 / a , greater than the next seven largest independent rivers combined -- the Amazon represents 20 % of the global riverine discharge to the ocean .. discharge. Discharge ( hydrology ). largest independent rivers. list of rivers by discharge. The Amazon basin is the largest drainage basin in the world , with an area of approximately 7050000 km2 .. Amazon basin. Amazon basin. drainage basin. drainage basin. The portion of the river 's drainage basin in Brazil alone is larger than any other river 's basin .. drainage basin. drainage basin. Brazil. Brazil. The Amazon enters Brazil with only one-fifth of the flow it finally discharges into the Atlantic Ocean , yet already has a greater flow at this point than the discharge of any other river .. discharge. Discharge ( hydrology ). Brazil. Brazil. Atlantic Ocean. Atlantic Ocean
related.