Background: Jan van Eyck (Dutch: ['jan van 'eik]) (before c. 1390 - 9 July 1441) was an Early Netherlandish painter active in Bruges. He is often considered one of the founders of Early Netherlandish painting, and, one of the most significant representatives of Northern Renaissance art.
Context: Van Eyck served as official to John of Bavaria-Straubing, ruler of Holland, Hainault and Zeeland. By this time he had assembled a small workshop and was involved in redecorating the Binnenhof palace in The Hague. After John's death in 1425 he moved to Bruges and came to the attention of Philip the Good c. 1425. His emergence as a collectable painter generally follows his appointment to Philip's court, and from this point his activity in the court is comparatively well documented. He served as court artist and diplomat, and was a senior member of the Tournai painters' guild. On 18 October 1427, the Feast of St. Luke, he travelled to Tournai to attend a banquet in his honour, also attended by Robert Campin and Rogier van der Weyden.  A court salary freed him from commissioned work, and allowed a large degree of artistic freedom. Over the following decade van Eyck's reputation and technical ability grew, mostly from his innovative approaches towards the handling and manipulating of oil paint. Unlike most of his peers his reputation never diminished and he remained well regarded over the following centuries. His revolutionary approach to oil was such that a myth, perpetuated by Giorgio Vasari, arose that he had invented oil painting.  His brother Hubert van Eyck collaborated on Jan's most famous works, the Ghent Altarpiece, generally art historians believe it was begun c. 1420 by Hubert and completed by Jan in 1432. Another brother, Lambert, is mentioned in Burgundian court documents, and may have overseen his brother's workshop after Jan's death.
Question: When was he a court painter?
Answer: 

Background: Carroll was born in Joliet, Illinois on May 18, 1945. His father worked in a coal processing plant. The family moved to San Diego in 1954 where Carroll grew up. He describes his early years in Ocean Beach as an ideal childhood.
Context: Carroll is the author of Becoming a Critical Thinker, a textbook for introductory logic and critical thinking courses. It covers subjects such as language and critical thinking, the mass media and other sources of information, fallacies of reasoning, and inductive and deductive arguments. The book is subtitled A Guide for the New Millennium. Pearson Educational published the first edition in 2000 and the second edition was published in 2005. Becoming a Critical Thinker was born out of Carroll's classwork during his time in Sacramento City College.  The Skeptic's Dictionary is the print version of the website skepdic.com and is available in Dutch, English, Japanese, Korean, and Russian. It provides definitions, arguments, and essays on supernatural, occult, paranormal, and pseudo-scientific subjects. The book features many examples of pseudoscientific beliefs over its eight chapters. In the last chapter, Carroll provides ways to improve critical thinking and skepticism. Similar to the website, it takes a skeptical stance, typically assuming that something is false until proven otherwise. The book came about when Ted Weinstein, a literary agent, contacted Carroll about creating the book. The book was eventually published by John Wiley & Son in August 2003 as an inexpensive paperback. The book is intended to be biased towards the skeptical side; it is not targeted towards true believers.  Carroll also wrote a children's version of the Skeptic's dictionary which was released online on July 22, 2011. In 2013, it was published as a children's book under the title Mysteries and Science: Exploring Aliens, Ghosts, Monsters, the End of the World and Other Weird Things. He also wrote Unnatural Acts: Critical Thinking, Skepticism, and Science Exposed! which was initially published by the James Randi Educational Foundation as an e-book in 2011. A paperback version is available from Lulu. The Critical Thinker's Dictionary was published in 2013. It features short articles about cognitive biases and logical fallacies.
Question: What other books has he written?
Answer: Carroll also wrote a children's version of the Skeptic's dictionary

Background: Joseph Patrick Kennedy Sr. (September 6, 1888 - November 18, 1969) was an American businessman, investor, and politician known for his high-profile positions in United States politics. Kennedy was married to Rose Kennedy, and three of their nine children attained distinguished political positions: President John F. Kennedy (1917-1963), Attorney General and Senator Robert F. Kennedy (1925-1968), and longtime Senator Edward M. "Ted" Kennedy (1932-2009). He was a leading member of the Democratic Party and of the Irish Catholic community.
Context: Kennedy wanted his eldest son, Joe Jr., to become president, but after Joe Jr.'s death in August 1944, he became determined to make his second son, John, president.  Kennedy was consigned to the political shadows after his remarks during World War II ("Democracy is finished"), and he remained an intensely controversial figure among U.S. citizens because of his suspect business credentials, his Roman Catholicism, his opposition to Roosevelt's foreign policy, and his support for Joseph McCarthy. As a result, his presence in John F. Kennedy's presidential campaign had to be downplayed.  However, Kennedy still drove the campaign behind the scenes. He played a central role in planning strategy, fundraising, and coalition and alliance building. Kennedy almost oversaw the entire operation, supervising spending, helping to select advertising agencies, phoning local and state party leaders, newsmen, and business leaders.  Kennedy connections and influence were turned directly into political capital for the senatorial and presidential campaigns of sons John, Robert and Ted. Historian Richard J. Whalen describes Kennedy's influence on John Kennedy's policy decisions in his biography of Joe. Joe was influential in creating the Kennedy Cabinet (Robert Kennedy as Attorney General although he had never argued or tried a case, for example). However, in 1961, Joe Kennedy suffered a stroke that placed even more limitations on his influence in his sons' political careers. Kennedy expanded the Kennedy Compound, which continues as a major center of family get-togethers.  When John Kennedy was asked about the level of involvement and influence that his father had held in his razor-thin presidential victory over Richard Nixon, he would joke that on the eve before the election his father had asked him the exact number of votes he would need to win: there was no way he was paying "for a landslide". Kennedy was one of four fathers (the other three being George Tryon Harding, Nathaniel Fillmore, and George Herbert Walker Bush) to live through the entire presidency of a son.
Question: Was he a senator ?
Answer:
Kennedy connections and influence were turned directly into political capital for the senatorial and presidential campaigns of sons