UFC 169: Barão vs. Faber II was a mixed martial arts event held on February 1, 2014, at the Prudential Center in Newark, New Jersey.
UFC 173: Barão vs. Dillashaw was a mixed martial arts event held at the MGM Grand Garden Arena in Las Vegas, Nevada on May 24, 2014.
The Hunt-class minesweeper was a class of minesweeping sloop built between 1916 and 1919 for the Royal Navy.
 They were built in two discrete groups, the earlier Belvoir" group designed by the Ailsa Shipbuilding Company and the subsequent (and slightly larger) Aberdare" group designed by the Admiralty.
 They were classed as Fleet Minesweeping Sloops, that is ships intended to clear open water.
 The "Belvoir" group were named after British fox hunts.
 Those of the "Aberdare" group were originally named after coastal towns, watering places and fishing ports, some of which happened to be hunts by coincidence.
 However, all were soon renamed after inland locations to prevent confusion caused by the misunderstanding of signals and orders.
UFC Presents: Aldo vs. Faber, also referred to as WEC 48: Aldo vs. Faber was a mixed martial arts event held by World Extreme Cagefighting that took place on April 24, 2010 at ARCO Arena in Sacramento, California.
 This was WEC's first and only event on pay-per-view before their merger with the Ultimate Fighting Championship later that year.
Renan do Nascimento Mota Pegado, better known as Renan Barão, (] ) is a Brazilian professional mixed martial artist and the former UFC Bantamweight Champion.
 He held one of the longest unbeaten streaks in MMA history - following a loss in his professional debut, he recorded 32 straight fights without a loss (31 victories and 1 no contest) over a span of 9 years.
 During his championship reign, he was ranked as a top 3 pound for pound fighter and regarded as one of the best mixed martial artists in the world.
 His nickname "Barão" (baron), which predates his athletic career, was given to him by his grandmother after a character in the 1986 Brazilian soap opera "Sinhá Moça".
UFC on Fox: Dillashaw vs. Barão 2 (also known as UFC on Fox 16) was a mixed martial arts event held on July 25, 2015, at the United Center in Chicago, Illinois.
WebCL (Web Computing Language) is a JavaScript binding to OpenCL for heterogeneous parallel computing within any compatible web browser without the use of plug-ins, first announced in March 2011.
 It is developed on similar grounds as OpenCL and is considered as a browser version of the latter.
 Primarily, WebCL allows web applications to actualize speed with multi-core CPUs and GPUs. With the growing popularity of applications that need parallel processing like image editing, augmented reality applications and sophisticated gaming, it has become more important to improve the computational speed.
 With these background reasons, a non-profit Khronos Group designed and developed WebCL, which is a Javascript binding to OpenCL with a portable kernel programming, enabling parallel computing on web browsers, across a wide range of devices.
 In short, WebCL consists of two parts, one being Kernel programming, which runs on the processors (devices) and the other being JavaScript, which binds the web application to OpenCL.
 The completed and ratified specification for WebCL 1.0 was released on March 19, 2014.
ARC-ECRIS is an Electron Cyclotron Resonance Ion Source based on arc-shaped coils unlike the conventional ECRIS which bases on a multipole magnet (usually a hexapole magnet) inside a solenoid magnet.
 First time the arc-shaped coils were used already in the 1960s in fusion experiments, for example at the Lawrence Livermore National Laboratory (MFTF, Baseball II, ...) and later in Japan (GAMMA10, ...).
 In 2006 the JYFL ion source group designed, constructed and tested similar plasma trap to produce highly charged heavy ion beams.
 The first tests were promising and showed that a stable plasma can be confined in an arc-coil magnetic field structure (see references).
Prudential Center is a multi-purpose indoor arena in the central business district of Newark, New Jersey, United States.
 It was designed by HOK Sport (now Populous), with the exterior designed by Morris Adjmi Architects.
 Opened in 2007, it is the home of the New Jersey Devils of the National Hockey League (NHL) and the Seton Hall Pirates men's basketball team from Seton Hall University.
 The arena seats 16,514 patrons for hockey and 18,711 for basketball.
 Fans and sports writers have affectionately nicknamed the arena "The Rock" in reference to the Rock of Gibraltar, the corporate logo of Prudential Financial, a financial institution that owns the naming rights to the arena and is headquartered within walking distance of it.
 In December 2013, the arena ranked third nationally and ninth internationally for self-reported annual revenue.
UFC on Fuel TV: Barão vs. McDonald (also known as UFC on Fuel TV 7) was a mixed martial arts event held by the Ultimate Fighting Championship on February 16, 2013, at Wembley Arena in London, United Kingdom.

Question: Which group designed the venue that held UFC 169: Barão vs. Faber II in 2014?
Answer: HOK Sport