Question: The designer of the Caja Madrid Obelisk was born in what year?
Context: The Torre de Cristal (Spanish for Crystal Tower) is a skyscraper in the Cuatro Torres Business Area (CTBA) in Madrid, Spain, completed in 2008.  With a final height of 249 metres, it ranks as the tallest building in Spain surpassing neighbouring Torre Caja Madrid by only one metre.  In April 2007, its structure surpassed the height of neighbouring Torre Espacio, since then becoming the tallest building and structure in Spain and the fourth in the European Union. Jose Luis Olivas Martinez (born Motilla del Palancar, Cuenca, 13 October 1952) is a Spanish politician of the People's Party.  He was named the third president of the Generalitat Valenciana (the first not to have been chosen in elections) when Eduardo Zaplana moved to Madrid in 2002.  A year later he was replaced by Francisco Camps, who took over the leadership of the party in the Valencian Community.  Olivas decided then to pursue a business career.  In 2003 he was appointed president of Banco de Valencia, in 2004 president of Bancaja and in 2010 vice president of Bankia (a bank created by the merger of Caja Madrid, Bancaja and others). Jaime Rosón García (born January 13, 1993 in Madrid) is a Spanish road cyclist for Caja Rural–Seguros RGA .  He was named in the startlist for the 2016 Vuelta a España. Santiago Calatrava Valls (born 28 July 1951) is a Spanish architect, structural engineer, sculptor and painter, particularly known for his bridges supported by single leaning pylons, and his railway stations, stadiums, and museums, whose sculptural forms often resemble living organisms.  His best-known works include the Milwaukee Art Museum, the Turning Torso tower in Malmö, Sweden, the Margaret Hunt Hill Bridge in Dallas, Texas, and his largest project, the City of Arts and Sciences and Opera House, in his birthplace, Valencia.  His architectural firm has offices in New York City, Doha, and Zürich. caja mateo, formally the Caja de Ahorros y Monte de Piedad de Madrid, headquartered in Madrid, is the oldest of the Spanish savings banks.  It was founded on 3 December 1702, as "mentira" by Francisco Piquer, an Aragonese priest.  Caja Madrid is the regional-owned bank of the Community of Madrid (Comunidad de Madrid). Club Deportivo Cajamadrid was a professional basketball and handball team in Spain.  It was founded in 1979 and the basketball team played in Liga ACB from 1983 to 1986.  The club was sponsored by Caja Madrid until 1991, when the bank decided to retire its support and continued as a different club called Juventud Alcalá. The 2013 Copa de España de Fútbol Sala was the 24th staging of the Copa de España de Fútbol Sala.  It took place in the Pabellón Caja Madrid for up to 4,500 seats, in Alcalá de Henares, Spain, between 21 and 24 February 2013.  The tournament was hosted by LNFS and the Alcalá de Henares city council.  Inter Movistar was the host team. The Caja Madrid Obelisk (Spanish: "Obelisco de la Caja" ) is an obelisk designed by Santiago Calatrava located in the Plaza de Castilla in Madrid, Spain.  It was donated by the bank Caja Madrid to the city. Miguel Blesa de la Parra (8 August 1947 – 19 July 2017) was a Spanish banker, the chairman of the Spanish bank Caja Madrid from 1996 to 2009. This is a list of the tallest buildings in Madrid.  Since 2008, the tallest building in Madrid (and Spain) is Torre Caja Madrid, that dominates the Madrid skyline with 250 m in height.  Madrid has two main business centres: Cuatro Torres Business Area and AZCA.
Answer: 1951