Question: The newspaper that established a football award that goes to the goalkeeper who has the lowest "goals-to-games" ratio that ocuses primarily on football, in particular the day-to-day activities of Real Madrid, Atlético Madrid and Rayo Vallecano, is owned by what company?

Context paragraphs:
Ciudad Deportiva Rayo Vallecano: Ciudad Deportiva Fundación Rayo Vallecano is the training ground of Rayo Vallecano.  It is located in Madrid.

Marca (newspaper): MARCA is a Spanish national daily sport newspaper owned by Unidad Editorial.  The newspaper focuses primarily on football, in particular the day-to-day activities of Real Madrid, Atlético Madrid and Rayo Vallecano.  It has a daily readership of over 2,500,000, the highest in Spain for a daily newspaper, and more than half of sports readership.

Rayo Vallecano B: Rayo Vallecano de Madrid B is the reserve team of Rayo Vallecano, a Spanish football club based in the Madrid neighbourhood of Vallecas.  Founded in 1956 and plays in Tercera División, holding home matches at "Ciudad Deportiva Rayo Vallecano", with a 1,000-seat capacity.

Julian Calero Fernandez: Julian Fernandez (born 26 October 1970) is a Spanish Football Manager and is currently the Assistant coach of Real Oviedo in the Segunda División.  Fernandez has coaching experience with Atletico de Madrid, Rayo Vallecano SAD, Real Madrid C.F., Alcobendas Sport, Volga Nizhny Novgorod, AD Parla, the United Arab Emirates , FC Porto and Real Oviedo in the Segunda División.

2013 Copa del Rey Final: The 2013 Copa del Rey Final was the 111th final since its establishment.  The match was a Madrid derby between Real Madrid and Atlético Madrid on 17 May 2013 at the Santiago Bernabéu Stadium in Madrid.  It was the clubs' first meeting in the final since the 1992 final when Atlético won 2–0 over Real Madrid.  Before this match, the two teams have been finalists on four other occasions in 1960, 1961 and 1975 Copa del Rey; all Atlético wins; except 1975 when Real Madrid won.  Atlético lifted the trophy for the tenth time in their history.

Sandra Vilanova: Sandra Vilanova Tous (born 1 January 1981) is a Spanish football midfielder who plays for RCD Espanyol of the Primera División.  She previously played for Levante UD, Rayo Vallecano and Atlético Madrid, winning three league titles and five national cups.  She also played the UEFA Women's Champions League with Levante and Rayo, and she was a member of the Spanish national team for a decade.  She retired after captaining Spain in the 2013 European Championship, but made a comeback with Espanyol the following year.

Marta Docando: Marta Docando Gómez, a.k.a. Marti, is a Spanish football midfielder, currently playing for Atlético Madrid in the Spanish First Division, where she serves as the team's captain.  She previously played for Rayo Vallecano and AD Torrejón.

Ricardo Zamora Trophy: The Zamora Trophy (Spanish: "Trofeo Ricardo Zamora" ) is a football award, established by Spanish newspaper "MARCA" in 1958.  The award goes to the goalkeeper who has the lowest "goals-to-games" ratio.

Cristina Pizarro: Cristina Pizarro Mingo, also known as Chini, is a Spanish football defender, currently playing for Real Sociedad in Spain's Primera División.  She previously played for Atlético Madrid and Rayo Vallecano.

Sonia Bermúdez: Sonia Bermúdez Tribano (born 18 November 1984 in Vallecas, Madrid), commonly known as Sonia or Soni, is a Spanish footballer who plays as a forward for Primera División club Atlético Madrid and the Spain women's national football team.  With previous passages for Rayo Vallecano, FC Barcelona and NWSL club Western New York Flash, she won the women's Primera División seven consecutive times (three with Rayo Vallecano and four with Barcelona) from 2008–09 until 2014–15.

Supporting paragraphs: Ricardo Zamora Trophy Marca (newspaper)
Answer: Unidad Editorial