IN: Dan Gerhard Brown was born on June 22, 1964 in Exeter, New Hampshire. He has a younger sister, Valerie (born 1968) and brother, Gregory (born 1975). Brown attended Exeter's public schools until the ninth grade. He grew up on the campus of Phillips Exeter Academy, where his father, Richard G. Brown, was a teacher of mathematics and wrote textbooks from 1968 until his retirement in 1997.

In August 2005 author Lewis Perdue unsuccessfully sued Brown for plagiarism, on the basis of claimed similarity between The Da Vinci Code and his novels, The Da Vinci Legacy (1983) and Daughter of God (2000). Judge George Daniels said, in part: "A reasonable average lay observer would not conclude that The Da Vinci Code is substantially similar to Daughter of God."  In April 2006 Brown's publisher, Random House, won a copyright infringement case brought by authors Michael Baigent and Richard Leigh, who claimed that Brown stole ideas from their 1982 book Holy Blood Holy Grail for his 2003 novel The Da Vinci Code. It was in the book Holy Blood Holy Grail that Baigent, Leigh, and co-author Henry Lincoln had advanced the theory that Jesus and Mary Magdalene married and had a child and that the bloodline continues to this day. Brown apparently alluded to the two authors' names in his book. Leigh Teabing, a lead character in both the novel and the film, uses Leigh's name as the first name, and anagrammatically derives his last name from Baigent's. Mr Justice Peter Smith found in Brown's favor in the case, and as a private amusement, embedded his own Smithy code in the written judgment.  On March 28, 2007, Brown's publisher, Random House, won an appeal copyright infringement case. The Court of Appeal of England and Wales rejected the efforts from Baigent and Leigh, who became liable for paying legal expenses of nearly US$6 million.  Brown has been sued twice in U.S. Federal courts by the author Jack Dunn who claims Brown copied a huge part of his book The Vatican Boys to write The Da Vinci Code (2006-07) and Angels & Demons (2011-12). Both lawsuits were not allowed to go to a jury trial. In 2017, in London, another claim was begun against Brown by Jack Dunn who claimed that Justice was not served in the U.S. lawsuits.

why did he sue?

OUT: Daniels said, in part: "A reasonable average lay observer would not conclude that The Da Vinci Code is substantially similar to Daughter of God."

Answer the question at the end by quoting:

Pink Floyd were an English rock band formed in London in 1965. They achieved international acclaim with their progressive and psychedelic music. Distinguished by their use of philosophical lyrics, sonic experimentation, extended compositions, and elaborate live shows, they are one of the most commercially successful and influential groups in popular music history. Pink Floyd were founded by students Syd Barrett on guitar and lead vocals, Nick Mason on drums, Roger Waters on bass and vocals, and Richard Wright on keyboards and vocals.
In December 1967, the group added guitarist David Gilmour as the fifth member of Pink Floyd. Gilmour already knew Barrett, having studied with him at Cambridge Tech in the early 1960s. The two had performed at lunchtimes together with guitars and harmonicas, and later hitch-hiked and busked their way around the south of France. In 1965, while a member of Joker's Wild, Gilmour had watched the Tea Set. Morrison's assistant, Steve O'Rourke, set Gilmour up in a room at O'Rourke's house with a salary of PS30 per week (equivalent to PS500 in 2016), and in January 1968, Blackhill Enterprises announced Gilmour as the band's newest member; the second guitarist and its fifth member, the band intending to continue with Barrett as a nonperforming songwriter. Jenner commented: "The idea was that Dave would ... cover for [Barrett's] eccentricities and when that got to be not workable, Syd was just going to write. Just to try to keep him involved". In an expression of his frustration, Barrett, who was expected to write additional hit singles to follow up "Arnold Layne" and "See Emily Play", instead introduced "Have You Got It Yet?" to the band, intentionally changing the structure on each performance so as to make the song impossible to follow and learn. In a January 1968 photo-shoot of the five-man Pink Floyd, the photographs show Barrett looking detached from the others, staring into the distance.  Working with Barrett eventually proved too difficult, and matters came to a conclusion in January while en route to a performance in Southampton when a band member asked if they should collect Barrett. According to Gilmour, the answer was "Nah, let's not bother", signalling the end of Barrett's tenure with Pink Floyd. Waters later admitted, "He was our friend, but most of the time we now wanted to strangle him". In early March 1968, Pink Floyd met with business partners Jenner and King to discuss the band's future; Barrett agreed to leave.  Jenner and King believed Barrett to be the creative genius of the band, and decided to represent him and end their relationship with Pink Floyd. Morrison then sold his business to NEMS Enterprises, and O'Rourke became the band's personal manager. Blackhill announced Barrett's departure on 6 April 1968. After Barrett's departure, the burden of lyrical composition and creative direction fell mostly on Waters. Initially, Gilmour mimed to Barrett's voice on the group's European TV appearances; however, while playing on the university circuit, they avoided Barrett songs in favour of Waters and Wright material such as "It Would Be So Nice" and "Careful with That Axe, Eugene".

What was his role in the band prior to leaving?

a nonperforming songwriter.

input: Alcott's published books, all from late in his life, include Tablets (1868), Concord Days (1872), New Connecticut (1881), and Sonnets and Canzonets (1882). Louisa May attended to her father's needs in his final years. She purchased a house for her sister Anna which had been the last home of Henry David Thoreau, now known as the Thoreau-Alcott House. Louisa and her parents moved in with Anna as well.  After the death of his wife Abby May on November 25, 1877, Alcott never returned to Orchard House, too heartbroken to live there. He and Louisa May collaborated on a memoir and went over her papers, letters, and journals. "My heart bleeds with the memories of those days", he wrote, "and even long years, of cheerless anxiety and hopeless dependence." Louisa noted her father had become "restless with his anchor gone". They gave up on the memoir project and Louisa burned many of her mother's papers.  On January 19, 1879, Alcott and Franklin Benjamin Sanborn wrote a prospectus for a new school which they distributed to potentially interested people throughout the country. The result was the Concord School of Philosophy and Literature, which held its first session in 1879 in Alcott's study in the Orchard House. In 1880 the school moved to the Hillside Chapel, a building next to the house, where he held conversations and, over the course of successive summers, as he entered his eighties, invited others to give lectures on themes in philosophy, religion and letters. The school, considered one of the first formal adult education centers in America, was also attended by foreign scholars. It continued for nine years.  In April 1882, Alcott's friend and benefactor Ralph Waldo Emerson was sick and bedridden. After visiting him, Alcott wrote, "Concord will be shorn of its human splendor when he withdraws behind the cloud." Emerson died the next day. Alcott himself moved out of Concord for his final years, settling at 10 Louisburg Square in Boston beginning in 1885.  As he was bedridden at the end of his life, Alcott's daughter Louisa May came to visit him at Louisburg on March 1, 1888. He said to her, "I am going up. Come with me." She responded, "I wish I could." He died three days later on March 4; Louisa May died only two days after her father.

Answer this question "What did he do  after his wife died?"
output:
They gave up on the memoir project and Louisa burned many of her mother's papers.