paragraph_text: Trinidad and Tobago gained its independence from the United Kingdom on 31 August 1962. Elizabeth II remained head of state as Queen of Trinidad and Tobago. Eric Williams, a noted Caribbean historian, widely regarded as The Father of The Nation, was the first Prime Minister; he served from 1956 to 1959, before independence as Chief Minister, from 1959 to 1962, before independence as Premier, from 1962 to 1976, after independence as Prime Minister of the Commonwealth of Trinidad and Tobago, then from 1976 to his death in 1981 as Prime Minister of the Republic of Trinidad and Tobago. Rudranath Capildeo was the first Leader of the Opposition post-independence; he served from 1962 to 1967.

paragraph_text: Huang Ju (28 September 1938 – 2 June 2007) was a Chinese politician and a high-ranking leader in the Communist Party of China. He was a member of the Politburo Standing Committee, China's top decision making body, between 2002 and 2007, and also served as the first-ranked Vice Premier of the People's Republic of China beginning in 2003. He died in office before he could complete his terms on the Standing Committee and as Vice-Premier.

paragraph_text: Bal Gangadhar Tilak (or Lokmanya Tilak, pronunciation (help info); 23 July 1856 -- 1 August 1920), born as Keshav Gangadhar Tilak, was an Indian nationalist, teacher, social reformer, lawyer and an independence activist. He was the first leader of the Indian Independence Movement. The British colonial authorities called him ``The father of the Indian unrest. ''He was also conferred with the title of`` Lokmanya'', which means ``accepted by the people (as their leader) ''.

paragraph_text: Years Material Weight (grains) Weight (grams) 1793 -- 1795 ~ 100% copper 208 grains 13.48 1795 -- 1857 ~ 100% copper 168 grains 10.89 1856 -- 1864 88% copper, 12% nickel (also known as NS - 12) 72 grains 4.67 1864 -- 1942 bronze (95% copper, 5% tin and zinc) 48 grains 3.11 1943 zinc - coated steel (also known as 1943 steel cent) 42 grains 2.72 1944 -- 1946 brass (shell case copper) (95% copper, 5% zinc) 48 grains 3.11 1947 -- 1962 bronze (95% copper, 5% tin and zinc) 48 grains 3.11 1962 -- 1981 brass (95% copper, 5% zinc) 48 grains 3.11 1982 brass (95% copper, 5% zinc) 48 grains 3.11 copper - plated zinc (97.5% zinc, 2.5% copper) 38.6 grains 2.5 1983 - present copper - plated zinc (97.5% zinc, 2.5% copper) 38.6 grains 2.5

paragraph_text: The idea of using a durable lightweight substance as evidence of a promise to pay a bearer on demand originated in China during the Han Dynasty in 118 BC, and was made of leather. Although Carthage was purported to have issued bank notes on parchment or leather, at least before the city's destruction in 146 BC, making Carthage the oldest known user of lightweight promissory notes. The first known banknote was first developed in China during the Tang and Song dynasties, starting in the 7th century. Its roots were in merchant receipts of deposit during the Tang Dynasty (618 -- 907), as merchants and wholesalers desired to avoid the heavy bulk of copper coinage in large commercial transactions. During the Yuan Dynasty, banknotes were adopted by the Mongol Empire. In Europe, the concept of banknotes was first introduced during the 13th century by travelers such as Marco Polo, with European banknotes appearing in 1661 in Sweden.

paragraph_text: Sichuan has been historically known as the "Province of Abundance". It is one of the major agricultural production bases of China. Grain, including rice and wheat, is the major product with output that ranked first in China in 1999. Commercial crops include citrus fruits, sugar cane, sweet potatoes, peaches and grapes. Sichuan also had the largest output of pork among all the provinces and the second largest output of silkworm cocoons in 1999. Sichuan is rich in mineral resources. It has more than 132 kinds of proven underground mineral resources including vanadium, titanium, and lithium being the largest in China. The Panxi region alone possesses 13.3% of the reserves of iron, 93% of titanium, 69% of vanadium, and 83% of the cobalt of the whole country. Sichuan also possesses China's largest proven natural gas reserves, the majority of which is transported to more developed eastern regions.

paragraph_text: Cobalt (II) chloride is an inorganic compound of cobalt and chlorine, with the formula CoCl. It is usually supplied as the hexahydrate CoCl 6H O, which is one of the most commonly used cobalt compounds in the lab.

paragraph_text: The Mongol conquest of China was a series of major military efforts by the Mongol Empire to invade China proper. It spanned six decades in the 13th century and involved the defeat of the Jin dynasty, Western Xia, the Dali Kingdom and the Southern Song. The Mongol Empire under Genghis Khan started the conquest with small - scale raids into Western Xia in 1205 and 1207. By 1279, the Mongol leader Kublai Khan had established the Yuan dynasty in China and crushed the last Song resistance, which marked the onset of all of China under the Mongol Yuan rule. This was the first time in history that the whole of China was conquered and subsequently ruled by a foreign or non-native ruler.

paragraph_text: As part of the Unification of China, Qin Shi Huang (Chinese: 秦始皇; pinyin: Qín Shǐ Huáng, 260 BC – 210 BC) introduced a uniform copper coin with the inscription "Ban Liang" based on the coins previously used by Qin. All other forms of local currency were abolished. The coins were round with a square hole in the middle which was the common design for most Chinese copper coins until the 20th century. Due to the low value of an individual coin, the Chinese have traditionally strung a nominal thousand copper coins onto a piece of string. Government taxes were levied on both coins and products such as rolls of silk. Salaries were paid in "stones" (石, dàn) of grain during the Qin and Han dynasties.

paragraph_text: Copper is synthesized in massive stars and is present in the Earth's crust at a concentration of about 50 parts per million (ppm), where it occurs as native copper or in minerals such as the copper sulfides chalcopyrite and chalcocite, the copper carbonates azurite and malachite, and the copper(I) oxide mineral cuprite. The largest mass of elemental copper discovered weighed 420 tonnes and was found in 1857 on the Keweenaw Peninsula in Michigan, US. Native copper is a polycrystal, with the largest described single crystal measuring 4.4×3.2×3.2 cm.

paragraph_text: Georg Brandt (26 June 1694 – 29 April 1768) was a Swedish chemist and mineralogist who discovered cobalt (c.1735). He was the first person to discover a metal unknown in ancient times.

paragraph_text: Years Material Weight (grains) Weight (grams) 1793 -- 1795 ~ 100% copper 208 grains 13.48 1795 -- 1857 ~ 100% copper 168 grains 10.89 1856 -- 1864 88% copper, 12% nickel (also known as NS - 12) 72 grains 4.67 1864 -- 1942 bronze (95% copper, 5% tin and zinc) 48 grains 3.11 1943 zinc - coated steel (also known as 1943 steel cent) 42 grains 2.72 1944 -- 1946 brass (shell case copper) (95% copper, 5% zinc) 48 grains 3.11 1947 -- 1962 bronze (95% copper, 5% tin and zinc) 48 grains 3.11 1962 -- 1981 brass (95% copper, 5% zinc) 48 grains 3.11 1982 brass (95% copper, 5% zinc) 48 grains 3.11 copper - plated zinc (97.5% zinc, 2.5% copper) 38.6 grains 2.5 1983 -- present copper - plated zinc (97.5% zinc, 2.5% copper) 38.6 grains 2.5

paragraph_text: In 2008, Bloomberg claimed child labour in copper and cobalt mines that supplied Chinese companies in Congo. The children are creuseurs, that is they dig the ore by hand, carry sacks of ores on their backs, and these are then purchased by these companies. Over 60 of Katanga's 75 processing plants are owned by Chinese companies and 90 percent of the region's minerals go to China. An African NGO report claimed 80,000 child labourers under the age of 15, or about 40% of all miners, were supplying ore to Chinese companies in this African region. Amnesty International alleged in 2016 that some cobalt sold by Congo Dongfang Mining was produced by child labor, and that it was being used in lithium-ion batteries powering electric cars and mobile devices worldwide.

paragraph_text: Bal Gangadhar Tilak (or Lokmanya Tilak, pronunciation (help info); 23 July 1856 -- 1 August 1920), born as Keshav Gangadhar Tilak, was an Indian nationalist, teacher, lawyer and an independence activist. He was the first leader of the Indian Independence Movement. The British colonial authorities called him ``The father of the Indian unrest. ''He was also conferred with the title of`` Lokmanya'', which means ``accepted by the people (as their leader) ''.

paragraph_text: When iron and copper were discovered in the Upper Peninsula, impetus was created for the construction of the Soo Locks, completed in 1855. Along with mining, agriculture and logging became important industries. In 1899 Henry Ford built his first automobile factory in Highland Park, an independent city that is now surrounded by Detroit. General Motors was founded in Flint in 1908. Automobile assembly and associated manufacturing soon dominated Detroit, and the economy of Michigan.

paragraph_text: Sun Yat - sen (/ ˈsʊn ˈjɑːtˈsɛn /; 12 November 1866 -- 12 March 1925) was the founding father of the Republic of China. The first provisional president of the Republic of China, Sun was a Chinese physician, writer, philosopher, Georgist, calligrapher and revolutionary. As the foremost pioneer and first leader of a Republican China, Sun is referred to as the ``Father of the Nation ''in the Republic of China (ROC) and the`` forerunner of democratic revolution'' in the People's Republic of China (PRC). Sun played an instrumental role in the overthrow of the Qing dynasty (the last imperial dynasty of China) during the years leading up to the Xinhai Revolution. He was appointed to serve as Provisional President of the Republic of China when it was founded in 1912. He later co-founded the Kuomintang (Nationalist Party of China), serving as its first leader. Sun was a uniting figure in post-Imperial China, and he remains unique among 20th - century Chinese politicians for being widely revered amongst the people from both sides of the Taiwan Strait.

paragraph_text: The Nuclear Science Department at EPN is the only one in Ecuador and has the large infrastructure, related to irrradiation factilities like cobalt-60 source and Electron beam processing.

paragraph_text: Late Imperial China maintained both a silver and a copper currency system. The copper system was based on the copper cash (wen). The silver system had several units which by the Qing Dynasty were: 1 tael = 10 mace = 100 candareens = 1000 lí (silver cash).

paragraph_text: Britain's first use of brass occurred around the 3rd–2nd century BC. In North America, copper mining began with marginal workings by Native Americans. Native copper is known to have been extracted from sites on Isle Royale with primitive stone tools between 800 and 1600. Copper metallurgy was flourishing in South America, particularly in Peru around 1000 AD; it proceeded at a much slower rate on other continents. Copper burial ornamentals from the 15th century have been uncovered, but the metal's commercial production did not start until the early 20th century.

paragraph_text: The Republic of the Congo received full independence from France on August 15, 1960. Fulbert Youlou ruled as the country's first president until labour elements and rival political parties instigated a three-day uprising that ousted him. The Congolese military took charge of the country briefly and installed a civilian provisional government headed by Alphonse Massamba-Débat.

Question: Who was the first leader of the independent country that supplies copper and cobalt to China?
Answer: Fulbert Youlou