Background: Lee de Forest was born in 1873 in Council Bluffs, Iowa, the son of Anna Margaret (nee Robbins) and Henry Swift DeForest. He was a direct descendant of Jesse de Forest, the leader of a group of Walloon Huguenots who fled Europe in the 17th Century due to religious persecution. De Forest's father was a Congregational Church minister who hoped his son would also become a pastor. In 1879 the elder de Forest became president of the American Missionary Association's Talladega College in Talladega, Alabama, a school "open to all of either sex, without regard to sect, race, or color", and which educated primarily African-Americans.
Context: One of de Forest's areas of research at Federal Telegraph was improving the reception of signals, and he came up with the idea of strengthening the audio frequency output from a grid Audion by feeding it into a second tube for additional amplification. He called this a "cascade amplifier", which eventually consisted of chaining together up to three Audions.  At this time the American Telephone and Telegraph Company was researching ways to amplify telephone signals to provide better long-distance service, and it was recognized that de Forest's device had potential as a telephone line repeater. In mid-1912 an associate, John Stone Stone, contacted AT&T to arrange for de Forest to demonstrate his invention. It was found that de Forest's "gassy" version of the Audion could not handle even the relatively low voltages used by telephone lines. (Due to the way he constructed the tubes, de Forest's Audions would cease to operate with too high a vacuum.) However, careful research by Dr. Harold D. Arnold and his team at AT&T's Western Electric subsidiary determined that by improving the tube's design, it could be more fully evacuated, and the high vacuum allowed it to successfully operate at telephone line voltages. With these changes the Audion evolved into a modern electron-discharge vacuum tube, using electron flows rather than ions. (Dr. Irving Langmuir at the General Electric Corporation made similar findings, and both he and Arnold attempted to patent the "high vacuum" construction, but the U.S. Supreme Court ruled in 1931 that this modification could not be patented).  After a delay of ten months, in July 1913 AT&T, through a third party who disguised his link to the telephone company, purchased the wire rights to seven Audion patents for $50,000. De Forest had hoped for a higher payment, but was again in bad financial shape and was unable to bargain for more. In 1915, AT&T used the innovation to conduct the first transcontinental telephone calls, in conjunction with the Panama-Pacific International Exposition at San Francisco.
Question: was audio frequency amplification something he studied about?
Answer: One of de Forest's areas of research at Federal Telegraph was improving the reception of signals,

Problem: Background: Simon Phillip Cowell was born on 7 October 1959 in Lambeth, London, and raised in Elstree, Hertfordshire. His mother, Julie Brett (nee Josie Dalglish; 1925-2015), was a ballet dancer and socialite, and his father, Eric Selig Phillip Cowell (1918-1999), was an estate agent, property developer, and music industry executive. Cowell's paternal grandmother was a Polish immigrant. His father was from a mostly Jewish family, though he did not discuss his background with his children, and his mother was from a Christian background.
Context: In 2001, Cowell was given the role of judge on the first series of Pop Idol, a show that he and the show creator Simon Fuller successfully pitched to ITV Controller of Entertainment Claudia Rosencrantz. Cowell's S Records signed the top two finishers of the first season of Pop Idol, Will Young and Gareth Gates, both of whom went on to have No 1 UK hits, which were the top 2 best-selling singles of 2002, as well as that of top 2 of the decade of 2000s. He also became a judge on the first season of American Idol in 2002. With his notoriously critical reputation, Cowell has been likened to TV personalities such as Judith Sheindlin, and Anne Robinson of her show. Cowell's prominence grew, fed by his signature phrase, "I don't mean to be rude, but ...", inevitably followed by an unsparingly blunt appraisal of the contestant's talents, personality, or even physical appearance. A lot of these one-liners were the product of coaching that Cowell received from noted publicist Max Clifford (who was sacked by Cowell after being convicted of sex offences as of May 2014). Cowell also appeared on the one-off World Idol programme in 2003, where it became clear that each country's version of the Idol had attempted to come up with its own "Simon Cowell" type personality. In 2003, Cowell placed No 33 on Channel 4's list of the all-time 100 Worst Britons.  Cowell formed a new company Syco, which is divided into three units - Syco Music, Syco TV and Syco Film. Cowell returned to music with his latest brainchild signed to Syco, the internationally successful operatic pop group Il Divo, consisting of three opera singers and one pop singer of four different nationalities. Inspired by the success of Il Divo, Simon created a child version, Angelis, beating competition from similar groups emerging at Christmas 2006.  On 11 January 2010, Cowell's exit from American Idol was made official. By the time Cowell left American Idol, the show was on its seventh consecutive season in its leadership among all primetime programmes in the United States, even lasting up to 2011 in the longest winning streak in the US overall viewership and demographics in the Nielsen ratings. The 2010 season was Cowell's last on the show. He was replaced by Steven Tyler. It was also announced that FOX had acquired the rights to The X Factor USA, an American version of Cowell's British show, The X Factor, which began in September 2011.
Question: who else has he worked with within the franchise
Answer: