Question: Ahmet Ertegun (, Turkish spelling: Ahmet Ertegun ([ah'met erte'jyn]); (July 31 [O.S. 18 July] 1923 - December 14, 2006) was a Turkish-American businessman, songwriter and philanthropist. He was best known as the co-founder and president of Atlantic Records, and for discovering and championing many leading rhythm and blues and rock musicians. He also wrote classic blues and pop songs, and served as the chairman of the Rock and Roll Hall of Fame and museum, located in Cleveland, Ohio. Ertegun has been described as "one of the most significant figures in the modern recording industry."

A memorial service for Ertegun was held in New York on April 17, 2007. A large part of the evening was given over to musical performances. Wynton Marsalis opened the tribute with the jazz standard "Didn't He Ramble", Eric Clapton and Dr. John performed "Drinkin' Wine Spo-Dee-O-Dee", and other performers included Solomon Burke, Ben E. King, Sam Moore, Stevie Nicks, Crosby, Stills, Nash & Young, and Phil Collins. Another informal salute to him took place in Los Angeles on July 31, 2007, the anniversary of his birth. The tribute took place at Grauman's Egyptian Theatre in Hollywood. Several of his friends shared anecdotes about their experiences with him and the assembled gathering then saw a special screening of the American Masters documentary Atlantic Records: The House That Ahmet Built. Among those who paid tribute to Ertegun in person were: Solomon Burke, Jerry Leiber & Mike Stoller, Keith Emerson, Peter Asher, Spencer Davis, the film's producer (and longtime friend) Phil Carson, Taylor Hackford and event producer Martin Lewis. Yusuf Islam, formerly known as Cat Stevens, came to America after a 20-year hiatus to attend the ceremonies. The Martin Scorsese film "Shine a Light" about The Rolling Stones concert held at the Beacon Theatre in New York contains a dedication to Ertegun and Andrea Corr's solo album Ten Feet High is dedicated "To the memory of Ahmet Ertegun". In honor of the barriers the Ertegun brothers broke during their time in segregated Washington, the current Turkish Ambassador to the U.S., Namik Tan, hosts a series of jazz concerts at the historical residence on Sheridan Circle in Washington, D.C. The "Ertegun Jazz Series," in collaboration with Jazz at Lincoln Center, revives the brothers' legacy of bridging cultures and bringing people together with one common objective: celebrating music. In that same spirit, Ambassador Tan is opening the doors of his home to residents of D.C. from various backgrounds - Members of Congress, Administration officials, academia, the media, business leaders, and others.

Using a quote from the above article, answer the following question: Who were some other attendants?
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Answer: Wynton Marsalis opened the tribute with the jazz standard "Didn't He Ramble", Eric Clapton and Dr. John performed "Drinkin' Wine Spo-Dee-O-Dee

Question: James Watt (30 January 1736 (19 January 1736 OS) - 25 August 1819) was a Scottish inventor, mechanical engineer, and chemist who improved on Thomas Newcomen's 1712 Newcomen steam engine with his Watt steam engine in 1781, which was fundamental to the changes brought by the Industrial Revolution in both his native Great Britain and the rest of the world. While working as an instrument maker at the University of Glasgow, Watt became interested in the technology of steam engines. He realised that contemporary engine designs wasted a great deal of energy by repeatedly cooling and reheating the cylinder. Watt introduced a design enhancement, the separate condenser, which avoided this waste of energy and radically improved the power, efficiency, and cost-effectiveness of steam engines.

From an early age Watt was very interested in chemistry. In late 1786, while in Paris, he witnessed an experiment by Berthollet in which he reacted hydrochloric acid with manganese dioxide to produce chlorine. He had already found that an aqueous solution of chlorine could bleach textiles, and had published his findings, which aroused great interest among many potential rivals. When Watt returned to Britain, he began experiments along these lines with hopes of finding a commercially viable process. He discovered that a mixture of salt, manganese dioxide and sulphuric acid could produce chlorine, which Watt believed might be a cheaper method. He passed the chlorine into a weak solution of alkali, and obtained a turbid solution that appeared to have good bleaching properties. He soon communicated these results to James McGrigor, his father-in-law, who was a bleacher in Glasgow. Otherwise he tried to keep his method a secret. With McGrigor and his wife Annie, he started to scale up the process, and in March 1788, McGrigor was able to bleach 1500 yards of cloth to his satisfaction. About this time Berthollet discovered the salt and sulphuric acid process, and published it so it became public knowledge. Many others began to experiment with improving the process, which still had many shortcomings, not the least of which was the problem of transporting the liquid product. Watt's rivals soon overtook him in developing the process, and he dropped out of the race. It was not until 1799, when Charles Tennant patented a process for producing solid bleaching powder (calcium hypochlorite) that it became a commercial success. By 1794 Watt had been chosen by Thomas Beddoes to manufacture apparatus to produce, clean and store gases for use in the new Pneumatic Institution at Hotwells in Bristol. Watt continued to experiment with various gases for several years, but by 1797 the medical uses for the "factitious airs" had come to a dead end.

Using a quote from the above article, answer the following question: And what did this contribution do?
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Answer:
By 1794 Watt had been chosen by Thomas Beddoes to manufacture apparatus to produce, clean and store gases for use in the new Pneumatic Institution at Hotwells in Bristol.