Question: By which Spanish river is the seat of the community that covers an area of 47720 km2 ?

text: List of Spanish regional legislatures
Autonomous Communities
Except for Andalusia , the Basque Country , Catalonia and Galicia , which were created by a special fast procedure , [ 6 ] most communities have very similar Statutes of Autonomy and election laws . Elections in those communities are fixed to a certain common date , which is currently `` the fourth Sunday of May each four years '' , [ 7 ] so regional Presidents can not trigger a snap election nor select the final election date from a range of close dates . However , there have been occasions when the Speaker of the Legislative Assembly has been forced to call an out-of-sync election because the legislature was deadlocked in the President election . In those cases , the next election still takes place at the fixed common date , causing the new term out of the fresh elections to be shorter than normal : see President of Madrid # The 6th term scandal . On the other hand , Presidents of communities created by the `` fast procedure '' can select the actual election date and trigger snap elections , and have frequently done so , particularly in the Basque Country and Catalonia . The Andalusian elections are usually set to coincide with the Spanish general elections , but again , there is no requisite to that effect in the Andalusian legislation .
Since its transition to democracy in the late 1970s, Spain has been organized in a quasi-federal system called the State of Autonomies. Each Autonomous Community is required by the Constitution to have its own three-branched system of government with its basic rules codified in a special law called a Statute of Autonomy, a sort-of regional constitution. Although there is no Constitutional requirement imposed upon regional elections other than that they must be based in proportional methods, all regional legislatures are unicameral, their members being elected in multi-member constituencies matching the provinces in the Autonomous Community with seats allocated to party lists using the D'Hondt method.
Community Legislature name Local names Seat Members President Last election Fixed
Andalusia Andalusian Parliament Sp . Parlamento de Andalucía Seville 109 Marta Bosquet C 's 2 December 2018 By President
Aragon Aragonese Corts Ara . Cortz d'Aragón Sp . Cortes de Aragón Zaragoza 67 Javier Sada PSOE 26 May 2019 By President
Asturias General Junta of the Principality of Asturias Ast . Xunta Xeneral del Principáu d'Asturies Sp . Junta General del Principado de Asturias Oviedo 45 Marcelino Marcos PSOE 26 May 2019 By law
Balearic Islands Parliament of the Balearic Islands Cat . Parlament de les Illes Balears Sp . Parlamento de las Islas Baleares Palma 59 Vicenç Thomàs PSIB 26 May 2019 By President
Basque Country Basque Parliament Ba . Eusko Legebiltzarra Sp . Parlamento Vasco Vitoria-Gasteiz 75 Bakartxo Tejeria PNV 25 September 2016 By President
Canary Islands Canarian Parliament Sp . Parlamento de Canarias Santa Cruz de Tenerife 70 Gustavo Adolfo Matos PSOE 26 May 2019 By President
Cantabria Parliament of Cantabria Sp . Parlamento de Cantabria Santander 35 Joaquín Gómez PSC-PSOE 26 May 2019 By law
Castile-La Mancha Cortes of Castile-La Mancha Sp . Cortes de Castilla-La Mancha Toledo 33 Pablo Bellido PSOE 26 May 2019 By law
Castile and Leon Cortes of Castile and León Sp . Cortes de Castilla y León Valladolid 81 Luis Fuentes C 's 26 May 2019 By President
Catalonia Parliament of Catalonia Cat . Parlament de Catalunya Oc . Parlament de Catalonha Sp . Parlamento de Cataluña Barcelona 135 Roger Torrent ERC 21 December 2017 By Spanish Prime Minister
Extremadura Extremaduran Assembly Sp . Asamblea de Extremadura Mérida 65 Blanca Martín PSOE 26 May 2019 By President
Galicia Parliament of Galicia Gal . Parlamento de Galicia Sp . Parlamento de Galicia Santiago de Compostela 75 Miguel Ángel Santalices PPdeG 25 September 2016 By President
La Rioja Parliament of La Rioja Sp . Parlamento de La Rioja Logroño 33 Jesús María García PSOE 26 May 2019 By law
Madrid Madrid Assembly Sp . Asamblea de Madrid Madrid 132 Juan Trinidad C 's 26 May 2019 By law
Region of Murcia Regional Assembly of Murcia Sp . Asamblea Regional de Murcia Cartagena 45 Alberto Castillo C 's 26 May 2019 By law
Navarre Parliament of Navarre Ba . Nafarroaku Parlamentua Sp . Parlamento de Navarra Pamplona-Iruña 50 Unai Hualde GBai 26 May 2019 By President
Valencian Community Valencian Corts Val . Corts Valencianes Sp . Cortes Valencianas Valencia 99 Enric Morera Compromís 28 April 2019 By President