Question: Who plays for a Spanish football club based in Vitoria-Gasteiz, Álava, as a left winger?
Context: Club Deportivo Ariznabarra is a Spanish football club based in Vitoria-Gasteiz, in the autonomous community of Basque Country.  Founded in 1972, it currently plays in the "Preferente Alavesa", holding home games at "Campo municipal de Ariznabarra". Sociedad Deportiva Becerreá is a Spanish football club based in Becerreá, Lugo, in the autonomous community of Galicia.  It currently plays in Segunda Autonómica - Group 8, the seventh level of Spanish football, holding home games at "Campo Municipal". Real Madrid C.F. is a professional association football club based in Madrid, Spain, that plays in La Liga.  The club was formed in 1902 as Madrid Football Club, and played its first competitive match on 13 May 1902, when it entered the semi-final of the Campeonato de Copa de S.M. Alfonso XIII.  Real Madrid was one of the founding members of La Liga in 1929, and is one of three clubs, including FC Barcelona and Athletic Bilbao, to have never been relegated from the league.  Since then, the club's first team has competed in numerous nationally and internationally organised competitions.  Real is the most successful club in Spanish football, having won a total of 64 domestic titles; a record 33 La Liga titles, 19 Spanish Cups, 10 Spanish Super Cups, 1 Copa Eva Duarte and 1 League Cup.  Real is the most successful club in European football, having won twenty one official UEFA trophies in total. Real Oviedo (Asturian: "Real Uviéu" ) is a Spanish football club based in Oviedo, in the autonomous community of Asturias.  Founded on 26 March 1926 as a result of the merger of two clubs who had maintained a large sporting rivalry for years in the city: "Real Stadium Club Ovetense" and "Real Club Deportivo Oviedo".  The club plays in the Segunda División, the second tier of the Spanish football league system. Deportivo Alavés, S.A.D. ] ; ("Sporting Alavés"), usually abbreviated to Alavés, is a Spanish football club based in Vitoria-Gasteiz, Álava, in the autonomous community of the Basque Country.  Founded in 23 June 1921 as Sport Fiend's Club, it plays in the highest football category of The Liga Nacional de Fútbol Profesional, La Liga, since the 2016–17 season. Club de Fútbol Nules is a Spanish football club based in Nules, Province of Castellón.  It was founded on 19 October 1931 and currently plays in the Regional Preferente Valenciana, fifth tier on spanish football. Club Deportivo Aurrerá de Vitoria is a Spanish sports club based in Vitoria-Gasteiz, Álava, in the autonomous community of the Basque Country.  Founded in 1935 it currently plays in Regional Preferente de Álava, holding home matches at "Estadio Olaranbe", with a 4,000-seat capacity. Deportivo Alavés B, S.A.D., usually known as Alavés B, is a Spanish football team based in Vitoria-Gasteiz, in the autonomous community of Basque Country.  Founded in 1961 it is the reserve team of Deportivo Alavés, and currently plays in Tercera División – Group 4, holding home at "Instalaciones de Ibaia José Luis Compañon", the training facilities of Alavés. Club San Ignacio is a football team based in Vitoria-Gasteiz in the autonomous community of Basque Country.  Founded in 1964, the team plays in Preferente of Álava.  The club's home ground is "Adurtzabal", which has a capacity of 400 spectators. Juan Antonio "Juanan" Entrena Gálvez (born 19 May 1996) is a Spanish footballer who plays for Croatian club NK Rudeš on loan from Deportivo Alavés as a left winger.
Answer: Juan Antonio "Juanan" Entrena Gálvez