Kent Isaacs, a Swedish producer, mixer, musician, songwriter and music-entrepreneur, is co-owner and operator of Cosmos Music Group, an independent Scandinavian music company.
 Isaacs has been known to work with Robyn, RZA, Slick Rick, Yusuf Islam (Cat Stevens), Clay Aiken, Eagle Eye Cherry, Infinite Mass, Arnthor and Stina Nordenstam (showcased on the hit 1996 soundtrack to "Romeo + Juliet").
The development of states—large-scale, populous, politically centralized, and socially stratified polities/societies governed by powerful rulers—marks one of the major milestones in the evolution of human societies.
 Archaeologists often distinguish between primary (or pristine) states and secondary states.
 Primary states evolved independently through largely internal developmental processes rather than through the influence of any other pre-existing state.
 The earliest known primary states appeared in Mesopotamia c. 3700 BC, in Egypt c. 3300 BC, in the Indus Valley c. 2500 BC, India c. 1700 BC, and in China c. 1600 BC.
 As they interacted with their less developed neighbors through trade, warfare, migration, and more generalized ideological influences, the primary states directly or indirectly fostered the emergence of secondary states in surrounding areas, for example, the Hittites in Anatolia, the Minoan and Mycenaean states of the Aegean, or the Nubian kingdoms in the Sudan.
 According to Professor Gil Stein of the University of Chicago Oriental Institute, "The excavations and archaeological surveys of the last few decades have vastly increased both the quantity and quality of what we know about ancient states and urbanism.
 Archaeologists have broadened the scope of their research beyond the traditional focus on rulers and urban elites.
 Current research now aims at understanding the role of urban commoners, craft specialists, and village-based farmers in the overall organization of ancient states and societies.
 Given the immense geographical scope encompassed by the term 'the Ancient World'".
 This is a list of sovereign states that existed between 700 BC and 601 BC.
 The notion of a sovereign state arises in the 16th century with the development of modern diplomacy.
 For earlier times, the term "sovereign state" is an anachronism.
 What corresponded to sovereign states in the medieval and ancient period were monarchs ruling by the grace of God, de facto feudal or imperial autocrats, or de facto independent nations or tribal confederations.
 This is a list of sovereign states that existed between 700 BC and 601 BC.
Dowager Sultana Khnata bent Bakkar (خناتة بنت بكار), (died 1754), was "de facto" ruler of Morocco from 1727 to ca. 1754.
 Also known as Hinata binti Bakar al-Gul, she acted as First Minister and Secretary for her husband Ismail Ibn Sharif, who reigned from 1672 to 1729.
 After his death followed a period of internal turmoil, where she remained the "de facto" ruler, during the reign of her husband's ten sons with various wives, who were all deposed, however she managed to lead Morocco out of the disastrous situation.
Cameron Ezike Giles (born February 4, 1976), better known by his stage name Cam'ron (formerly Killa Cam), is an American rapper, actor and entrepreneur from Harlem, New York.
 He is the "de facto" leader of East Coast hip hop group The Diplomats (also known as Dipset), and is a member of the duo U.N. (Us Now).
 Cam'ron was also a part of the group Children of the Corn before they disbanded in 1997.
Jay Wayne Jenkins (born September 28, 1977), better known by his stage name Jeezy (formerly Young Jeezy), is an American rapper.
 In 1998, he launched the label imprint CTE World (then known as Corporate Thugz Entertainment).
 Aside from his solo career, Jeezy is the "de facto" leader of the southern hip hop group United Streets Dopeboyz of America (USDA), and is a former member of the Bad Boy Records' rap group Boyz n da Hood.
 Jeezy is also known for helping pioneer the hip hop subgenre trap music, alongside fellow Atlanta-based rappers T.I. and Gucci Mane.
The Clandestine Colombian Communist Party (in Spanish: "Partido Comunista Clandestino Colombiano") is an underground communist party in Colombia.
 It is politically linked to the Revolutionary Armed Forces of Colombia (FARC), which founded the party in 2000, although a de facto After FARC officially broke with the Colombian Communist Party (CCP), a separate FARC-based party structure came into de facto existence during most of the 1990s, until the PCCC was officially founded in 2000.
 The party's founder and leader was FARC's commander Guillermo León Sáenz, also known as "Alfonso Cano", until he was killed in action in 2011.
Robert Fitzgerald Diggs (born July 5, 1969), better known by his stage name RZA ( "rizza"), is an American rapper, record producer, musician, actor, filmmaker and author.
 A prominent figure in hip hop, RZA is the "de facto" leader of the Wu-Tang Clan.
 He has produced almost all of Wu-Tang Clan's albums as well as many Wu-Tang solo and affiliate projects.
 He is a cousin of the late group-mate Ol' Dirty Bastard and GZA (who also formed the group with RZA).
 He has also released solo albums under the alter-ego Bobby Digital, along with executive producing credits for side projects.
The Democratic Federation of Northern Syria, most commonly known as Rojava, is a "de facto" autonomous region originating in and consisting of three self-governing cantons in northern Syria, namely Afrin Canton, Jazira Canton and Kobanî Canton, as well as adjacent areas of northern Syria like Shahba region.
 The region gained its de facto autonomy in 2012 as part of the ongoing Rojava conflict and the wider Syrian Civil War, establishing and gradually expanding a secular polity based on the democratic confederalist principles of democratic socialism, gender equality, and ecological sustainability.
Aaron Tyler (born May 22, 1967), better known by his stage name MC Eiht, is an American rapper born in Augusta, Georgia.
 Many of his songs are based on his life in Compton.
 His stage name was partly inspired by the numeral in KRS-One's name.
 He chose Eiht for its links to "hood culture", including Olde English 800 (8 Ball) and .38 caliber firearms.
 He is the "de facto" leader of West Coast hip hop group Compton's Most Wanted, which also included fellow Compton-based rappers Boom Bam, Tha Chill, DJ Mike T, DJ Slip and Ant Capone.
 He is also known for his role as A-Wax in the 1993 film "Menace II Society".
The development of states—large-scale, populous, politically centralized, and socially stratified polities/societies governed by powerful rulers—marks one of the major milestones in the evolution of human societies.
 Archaeologists often distinguish between primary (or pristine) states and secondary states.
 Primary states evolved independently through largely internal developmental processes rather than through the influence of any other pre-existing state.
 The earliest known primary states appeared in Mesopotamia c. 3700 BC, in Egypt c. 3300 BC, in the Indus Valley c. 2500 BC, India c. 1700 BC, and in China c. 1600 BC.
 As they interacted with their less developed neighbors through trade, warfare, migration, and more generalized ideological influences, the primary states directly or indirectly fostered the emergence of secondary states in surrounding areas, for example, the Hittites in Anatolia, the Minoan and Mycenaean states of the Aegean, or the Nubian kingdoms in the Sudan.
 According to Professor Gil Stein of the University of Chicago Oriental Institute, "The excavations and archaeological surveys of the last few decades have vastly increased both the quantity and quality of what we know about ancient states and urbanism.
 Archaeologists have broadened the scope of their research beyond the traditional focus on rulers and urban elites.
 Current research now aims at understanding the role of urban commoners, craft specialists, and village-based farmers in the overall organization of ancient states and societies.
 Given the immense geographical scope encompassed by the term 'the Ancient World'".
 The notion of a sovereign state arises in the 16th century with the development of modern diplomacy.
 For earlier times, the term "sovereign state" is an anachronism.
 What corresponded to sovereign states in the medieval and ancient period were monarchs ruling by the grace of God, de facto feudal or imperial autocrats, or de facto independent nations or tribal confederations.

Question: Kent Isaacs has been known to work with an American rapper who is the "de facto" leader of what?
Answer: the Wu-Tang Clan