Question: Children in Need 2013 was the first broadcast from the production facility on what road in Hertfordshire?

Context paragraphs:
Elstree Studios (Shenley Road): Elstree Studios on Shenley Road, Borehamwood, Hertfordshire is a British film and television production facility operated by Elstree Film Studios Limited.  One of several facilities historically referred to as Elstree Studios, the Shenley Road studio site opened in 1925.

Camp Ravenna Joint Military Training Center: Camp Ravenna Joint Military Training Center, formerly known as the Ravenna Training and Logistics Site and the Ravenna Army Ammunition Plant (RVAAP) and commonly known as the Ravenna Arsenal, is an Ohio Army National Guard military base located between Ravenna and Newton Falls and adjacent to the village of Windham in the U.S. state of Ohio.  Before its present status as a training facility for the Ohio National Guard, Camp Ravenna was a military ammunition production facility for the United States Army.  As an arsenal, the facility was at peak operation during World War II and would serve as an ammunitions plant in various roles until 1992.  Camp Ravenna remains an important part of the history and geography of Portage County, Ohio.  The facility occupies portions of Freedom, Windham, Charlestown, and Paris townships in Portage County, along with part of Braceville Township in Trumbull County.

Martinizing Dry Cleaning: Martinizing Dry Cleaning is a dry cleaning franchise founded in 1949.  Martin Franchises, Inc., the parent company, is the largest dry cleaning franchise in the United States, with over 450 franchised stores worldwide.  The family-owned company is based in Loveland, Ohio.  The concept of One Hour Martinizing was pioneered by a New York chemist named Henry Martin in 1949.  At the time, dry cleaning was done with flammable solvents, so the plants were located remotely from the storefronts.  A customer would drop off their cleaning "in town", the garments would travel to the production facility to be cleaned and pressed, then they would return to the store several days later for pickup.  By using a non-flammable solvent, the use of which was discovered by Martin, dry cleaning plants could now be located much more conveniently, and the process could be carried out in a much more timely manner.  The use of this non-flammable solvent was adopted throughout the industry and revolutionized the business in that facilities could better serve their customers and provide much faster turn-around on the orders, if need be.  Operationally this has been termed "on-site cleaning" (as opposed to the "remote" cleaning of the past).

Children in Need 2013: Children in Need 2013 is a campaign held in the United Kingdom to raise money for the charity Children in Need.  2013 marks the 33rd anniversary of the appeal which culminated in a live broadcast on BBC One and BBC Two on the evening of Friday 15 November until the early hours of Saturday 16 November.  The broadcast was hosted by Sir Terry Wogan, with Tess Daly, Fearne Cotton, Zoë Ball and Nick Grimshaw as co-hosts.  The show was broadcast from the BBC in Elstree but also includes regular regional opt-outs.  The 2013 appeal marked the first Children in Need broadcast from BBC Elstree Centre after the closing down of the show's previous home Television Centre.  Its new studio, adjacent to the set of "EastEnders" enabled the show to include live segments and performances from the fictional Albert Square including star interviews in The Queen Victoria Pub hosted by cast member Shane Richie.

Televisa San Ángel: Televisa San Ángel (originally Estudios y Laboratorios San Ángel, S.A.) is a film and television studio located in Mexico City.  It was originally built by Jorge Stahl as a motion picture studio, and in the 1970s would be sold to the Azcárraga family, which, through ownership of the Televisa networks, continues to own the studios.  It is the headquarters facility of the Centro de Educación Artística (CEA) and the Videocine (formerly Televicine) motion picture production and distribution company.  The network's Centro de Post Produccion is also housed at San Ángel.  Moreover, it is best known as a motion picture and television studio.  It is the oldest movie and television production facility in Mexico and the most famous telenovela studio facility in Latin America.  It was one of the four main Mexican film studios along with Estudios Churubusco, Estudios América, and Estudios Tepeyac.

Children in Need Rocks 2013: Children in Need Rocks 2013 was a two-part charity music concert held at the Hammersmith Apollo in London, England, on 12 and 13 November 2013.  The concert was organised by Take That singer-songwriter and "The X Factor" judge Gary Barlow as one of a series of events to raise money for Children in Need 2013.  It is the third "Children in Need Rocks" concert organised by Barlow, after "Children in Need Rocks the Royal Albert Hall" in 2009 and "Children in Need Rocks Manchester" in 2011.

Park Road Post: Park Road Post is a 10,200 m² (110,000 ft²) motion picture post production facility, located in Miramar, New Zealand, a suburb of Wellington.  Formerly the state-owned "National Film Unit", the new facility was renamed Park Road Post upon completion in 2005.  Park Road Post is owned by WingNut Films, the production company of Peter Jackson.

Air Force Special Projects Production Facility: The Air Force Special Projects Production Facility was a top-secret facility operational at Westover Air Force Base from 1961 to 1976.  It was responsible for developing film from the Corona satellite program and other film projects that were top secret.  The facility was co-located with the 8th Reconnaissance Technical Squadron and developed the film used during the Cuban Missile Crisis.  It was also the primary production facility for the National Reconnaissance Program during this time.  The facility was also in charge of the Controlled Range Network, which served to calibrate Corona, Gambit, and Hexagon satellite programs.

Kenneth Nichols: Major General Kenneth David "Nick" Nichols (13 November 1907 – 21 February 2000) was a United States Army officer and an engineer.  He worked on the Manhattan Project, which developed the Atomic Bomb during World War II, as Deputy District Engineer to James C. Marshall, and from 13 August 1943 as the District Engineer of the Manhattan Engineer District.  He was responsible for both the uranium production facility at the Clinton Engineer Works at Oak Ridge, Tennessee and the plutonium production facility at Hanford Engineer Works in Washington state.

BBC Elstree Centre: BBC Elstree Centre, sometimes referred to as BBC Elstree Studios, is a television production facility located on Clarendon Road in Borehamwood, Hertfordshire.

Supporting paragraphs: Children in Need 2013 BBC Elstree Centre
Answer: Clarendon Road