Question: What is the name of the main rival of the group that Stephen Tse had heavy ties to? 

full_context: Document 1: Stanfield Organization: On the fictional television drama "The Wire", the Stanfield Organization is a criminal organization led by Marlo Stanfield. The Organization is introduced in Season Three of "The Wire" as a growing and significantly violent drug syndicate. Marlo has established his organization's power in West Baltimore's main streets in the shadow of the dominating Barksdale Organization, which was more concerned with conducting its activities in the Franklin Terrace Towers. The Stanfield Organization violently clashes with the Barksdale crew after the latter is forced to move on from the demolished Franklin Terrace Towers and tries to reclaim the streets the gang once dominated. Marlo's is the only crew in the area not to let itself be absorbed into the feared Barksdale gang, and a violent turf war breaks out. The Stanfield Organization begins as the underdog, but fallout from the strain of the war combined with a successful investigation by the Major Crimes Unit manages to destroy the Barksdale Organization at the end of Season Three. By Season Four, Marlo's crew becomes the most powerful drug organization in West Baltimore, and forms an alliance with the New Day Co-Op while ruling its streets through fear. In Season Five, after a period of aggressive expansion which culminates in Marlo seizing control of the Co-Op, a series of arrests and deaths destroy the organization.
Document 2: Michael Chan (actor): Michael Chan Wai-man (; born 10 July 1946) is a Hong Kong actor. A Hakka of Wuhua ancestry born in New Territories, Chan was well known for various triad roles, when in actuality he had been involved with triads in real life. In a media interview, he admitted to have been the No. 2 the 14K Triad that dominated vice in Tsim Sha Tsui before the handover of Hong Kong. Having worked as a police officer in the prison system, he came into contact with many underworld figures and joined the Triads. Chan was expelled from the police force as a result of his links.
Document 3: Westies: The Westies were a New York City-based Irish American organized crime gang, responsible for racketeering, loan sharking, bookmaking, number writing, contract killing, drug trafficking, murder, illegal gambling, and extortion. They were partnered with the Italian-American Mafia, and operated out of the Hell's Kitchen neighborhood of Manhattan. According to crime author T. J. English, "Although never more than twelve to twenty members—depending on who was in or out of jail at any given time—the Westies became synonymous with the last generation of Irish in the birthplace of the Irish Mob..." According to the NYPD Organized Crime Squad and the FBI, the Westies were responsible for 60–100 murders between 1968 and 1986.
Document 4: Ping On: 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.
Document 5: On Cheong Jewellery: On Cheong Jewellery was founded in 1936 by Mr Ho Yew Ping, an emigrant of Guangdong Shunde province of China, who left Guangdong at age 14 to seek his fortune in Malaysia in 1925. In Penang and later Perak, he apprenticed as a goldsmith before marrying in Guangdong and moving to Singapore with his newly-wedded wife. On Cheong started a small goldsmith shop known as On Cheong Goldsmith on North Bridge Road. The name "On Cheong" or "安昌" in Chinese is derived from the phrase "平安昌盛", meaning peace and prosperity. On Cheong moved to its current location, a shophouse on South Bridge Road, in 1941. In the 1940s, Mr Ho Yew Ping also acquired Kwong Yik and Nan Jing Goldsmiths to expand the company. The company was incorporated as On Cheong Co Pte Ltd in 1949. Mr Ho Yew Ping’s wife, Mdm Leung Chew Fun, and the eldest son, Dr Ho Nai Kiong, took over the operations of the business after Mr Ho Yew Ping's passing in 1965. Its current Managing Director, Mr Ho Nai Chuen, the youngest of Mr Ho Yew Ping’s children, began managing the business in 1985. On Cheong Jewellery is one of the pioneer members of the Singapore Jewellers Association (SJA), a non-profit organisation established in 1939 representing jewellery operators in Singapore. Mr Ho is currently the President of SJA.
Document 6: Four big families of Hong Kong: The Four big families of Hong Kong () are an initial group of Chinese families. Today, the Big Four families and their descendants are Fortune Global 500 companies with multinational corporations and listings from the London Stock Exchange to the New York Stock Exchange. Along with their European mostly British rivals in colonial Hong Kong, they were responsible for much of the foundations of the territory including its economy, finance, and trade, whilst the British government provided the first codified legal system which until then and in most of China today, was lacking. The four big families begin with the Chinese surname Li, Ho, Hui and Lo. Respectively the head of four families are Li Sek-peng (), Robert Ho (), Hui Oi-chow () and Lo Cheung-shiu (). Today the two families most recognizable by regular Hong Kong citizens are the Li and Ho group descendants.
Document 7: 2010 in organized crime: Around the world are countless groupings of individuals who deal exclusively or through a mix of legitimate and illegal activities. These Organized crime groups or criminal organizations are a transnational grouping of highly centralized enterprises run by criminals for the purpose of engaging in illegal activity, most commonly for the purpose of generating a monetary profit. The Omnibus Crime Control and Safe Streets Act of 1968 (federal statute - Public Law 09-351) states, "Organized crime means the unlawful activities of members of a highly organized, disciplined association..." They are called a number of different names including: the Mafia (US, Italy), Yakuza (Japan), Chinese Triads, the Irish Mob, the Neapolitan Camorra, the Calabrian 'Ndrangheta, the Indian Mafia, the Unione Corse, Serbian Mafia, and the Bulgarian mafia.
Document 8: 14K Triad: 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.
Document 9: Hong Kong Recording Industry Alliance: Hong Kong Recording Industry Alliance Limited (HKRIA, ) is a not-for-profit copyright management organization, formed to handle copyright issues for recording companies regarding the broadcast, public performance and relevant usage of sound recordings (recorded music) and music videos in Hong Kong, Macau and other territories. The founding companies included the traditional internationally recognised Big Four Recording Companies (四大唱片公司) of EMI Group, Sony Music, Universal Music (環球) and Warner Music Group (華納). The group was established in October 2008. Later in December 2010, BMA Entertainment (博美) joined HKRIA, turning the Big Four into the Big Five. While BMA is
Document 10: Forty Thieves (New York gang): The Forty Thieves — likely named after Ali Baba and the Forty Thieves — were formed in 1825 and alleged to be the first known and oldest New York City criminal street gang. The Thieves consisted primarily of Irish immigrants, and Irish Americans who terrorized the Five Points neighborhood of 19th century Manhattan. Another criminal gang named the "Forty Thieves" which had no criminal ties to the New York gang was formed in London, England in 1828. From 1873-1950s, an all-female London criminal gang known as the "Forty Elephants" was also known to use the name the Forty Thieves. Later a criminal gang in Philadelphia called themselves the Forty Thieves. The Kerryonians another early Irish gang formed in the same year as the Forty Thieves were alleged to be the second oldest organized criminal gang in New York City.
Document 11: Flying Dragons (gang): The Flying Dragons also known as FDS () are a well known Chinese American street gang affiliated with the Hip Sing Tong; they are active in New York City's Chinatown, and have a presence in Hong Kong, Canada and Australia. The gang moved heavily into heroin trafficking after the Italian-American Mafia lost the trade as a result of the Pizza Connection prosecutions in the mid-1980s. The Flying Dragons are believed to have been started during the late 1970s to early 1980s.
Document 12: Wo Hop To: Wo Hop To, or WHT (和合圖) is a Triad group based in Wanchai, Hong Kong. The name translates to "Harmoniously United Association" or "Harmonious Union Plan" and is thought to have been founded in 1908 in Sai Ying Pun as a secret political organisation in opposition to the Qing dynasty. They are one of the Four Major Gangs (四大黑幫) of Hong Kong, the others being Wo Shing Wo, 14K and Sun Yee On.
Document 13: 116th Street Crew: The 116th Street crew, also known as the Uptown crew, is a powerful crew within the Genovese crime family. In the early 1960s, Anthony Salerno became one of the most powerful capos in the family. Salerno based the crew out of the "Palma Boys Social Club" located 416 East 115th Street in East Harlem, Manhattan. By the late 1970s and early 1980s, the 116th Street crew had absorbed and initiated many former members of the vicious East Harlem Purple Gang, an Italian-American murder for hire and drug trafficking gang operating in 1970s Italian Harlem and acting generally independent of the Mafia.
Document 14: Stephen Tan: Stephen Tan (born in 1961), () is first son of Robin Chan (Chairman of the Asia Financial Group), and a grandson of Chin Sophonpanich (founder and former president of Bangkok Bank). He serves as the Executive Director of the Asia Financial Group. He has a brother Bernard Chan, who is a Hong Kong politician and businessman, President of Asia Financial Group and its main subsidiary, Asia Insurance.
Document 15: Black Mafia: The Black Mafia, also known as the Muslim Mafia, Muslim Mob, Philadelphia Black Mafia, or PBM is a Philadelphia-based African-American organized crime syndicate. The organization began as a small criminal collective, known for holding up neighborhood craps games and dealing in the illegal drug business, but at its height of operation until about 1975, it managed to consolidate power and control a large portion of criminal activity in various African-American neighborhoods throughout Philadelphia, the Delaware Valley, and South Jersey, including Atlantic City. In addition to drug trafficking, burglary, and armed robbery, the Black Mafia was also engaged in traditional organized crime activities such as extortion, racketeering, prostitution, loansharking, number running and other illegal gambling rackets.
ground_truth: Sun Yee On