Question: What is the name of the main rival of the group that Stephen Tse had heavy ties to? 
Context: Stephen A. Geppi (born January 24, 1950) is an American comic book distributor, publisher and former comic store owner.  Having established an early chain of comic shops in Baltimore in the mid-late 1970s, he is best known for his distributing business.  Geppi founded Diamond Comic Distributors, the largest comic direct distribution service in 1982, and has served as the company's head to the present.  Diamond Distribution became the successor to direct market pioneer Phil Seuling's distribution dream when Geppi took over New Media/Irjax's warehouses in 1982.  He further bought out early-distributor Bud Plant in 1988, and main rival Capital City in 1996 to assume a near-monopoly on comics distribution, including exclusivity deals with the major comic book publishers. The 14K (十四K) is a triad group based in Hong Kong but active internationally.  It is the second largest Triad group in the world with around 25,000 members split into thirty subgroups.  They are the main rival of the Sun Yee On, which is the largest Triad. Gold (stylised as GOLD) is a British classic comedy channel from the UKTV network, broadcasting to the United Kingdom and Ireland.  It launched on 1 November 1992 as UK Gold, before, in 2008, it was split into current flagship channel Gold and miscellaneous channel, Watch, with comedy based programming now airing on Gold, non-crime drama and entertainment programming airing on Watch, and quiz shows and more high-brow comedy airing on Dave.  The channel is currently available as subscription-only on Sky, Virgin Media, TalkTalk TV, BT TV, and TVPlayer (When subscribed to TVPlayer Plus).  It shows repeats of classic programming from the BBC and other broadcasters.  The channel's main rival is the ITV plc owned ITV3, which mainly airs the archive ITV programmes, and has a higher audience share than Gold.  Another rival is More4 which also has a higher audience share than Gold.  This is because they are free-to-air channels whereas Gold is a pay TV channel.  On 1st December 2015 - 4th January 2016, Gold was temporarily rebranded as Christmas Gold.  This was repeated again from 12 November 2016 to 4 January 2017. Just Jeans is an Australian clothing chain store, owned and operated by the Just Group.  Including Just Jeans, The Just Group owns and operates a total of seven retail brands.  Other Just Group brands include Jay Jays, Jacqui E, Portmans, Dotti, Peter Alexander, and Smiggle.  The group currently has over 950 stores throughout Australia, New Zealand, Singapore and the United Kingdom.  Its main rival is Jeanswest, because they produce a similar style of denim outfits and both are based and operate mainly in Australia. The Samarkand clan (alternatively Samarqand) is an Uzbek clan led by Ismoil Jurabekov.  The clan is one of two major clans in Uzbekistan; the other, its main rival, is the Tashkent clan.  To a lesser extent, the Ferghana clan is also a rival.  Former Uzbek President Islam Karimov and current President Shavkat Mirziyoyev come from the Samarkand clan. A rivalry is the opposition between two competing parties (rivals).  Someone's main rival is called an archrival.  The words rivalry, rival and arch rival may also refer to: Hits is a compilation album series that ran in the United Kingdom for over twenty years from 1984 until 2006.  It was compiled as a joint venture, variously between the compilation arms of the Sony BMG and Warner Music groups to rival the "Now That's What I Call Music" series that had launched a year earlier in 1983, compiled by rival companies EMI and Virgin.  Initially, the "Hits" brand was arguably as popular as its main rival, with volume one through to volume eight all achieving at least a platinum BPI award, with several of the early albums going multi-platinum.  The standard release rate of "The Hits Album" was two volumes per year compared with three volumes of the "Now" albums. Gabriel Gatwech Chan (better known by his nickname Gabriel Tang or Gabriel Tang Ginye; 1960–4 January 2017) was a rebel militia leader in South Sudan.  General Tang led a southern border militia allied to the Khartoum government during Sudan's civil war.  Most of his fighters are of the Nuer ethnic group.  Members of the Sudanese armed forces loyal to Gen Tang in Malakal clashed with the Sudan People's Liberation Army (SPLA) in 2006, killing about 150 people, and in 2009 in breach of the peace deal.  In April 2011, clashes between his militia and the SPLA in the state of Jonglei killed at least 57 according to government officials.  Shortly thereafter, Tanginye surrendered to SPLA forces and had been under house arrest in Juba awaiting charges against him.  During the South Sudanese Civil War, he allied with Lam Akol's militia, a Juba linked rebel group called the National Democratic Movement and became its chief of staff.  In January 2017 he was killed in a clash with a group led by John Uliny from the main rival rebel group, the SPLM-IO.  In these clashes in the Hamra area in the northern Upper Nile, 20 others were killed. Amazon Fire OS is an Android-based mobile operating system produced by Amazon for its Fire Phone and Kindle Fire range of tablets, Echo and Echo Dot, and other content delivery devices like Fire TV; the tablet versions of the Kindle e-readers are the Fire range.  It is forked from Android.  Fire OS primarily centers on content consumption, with a customized user interface and heavy ties to content available from Amazon's own storefronts and services. The Ping On triad was a Boston-based criminal organization.  The organization rose to power in the 1970s and continued to operate throughout the 1980s, 1990s and early 2000s.  The Ping On was founded by Stephen "Sky Dragon" Tse who had heavy ties to the infamous 14K Triad in Hong Kong.
Answer: Sun Yee On