Question: When did Seth MacFarlane conceive of the idea for "Family Guy"?
About the article "Family Guy", section "Origins".

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Seth MacFarlane conceived the idea for "Family Guy" in 1995 while studying animation at the Rhode Island School of Design (RISD).
There he created his thesis film "The Life of Larry", which his professor at RISD later submitted to Hanna-Barbera; this led to MacFarlane being hired by the company.
In 1996, MacFarlane created a sequel to "The Life of Larry" entitled "Larry and Steve", which featured a middle-aged character named Larry and an intellectual dog, Steve; the short was broadcast in 1997 as one of Cartoon Network's "World Premiere Toons".
Executives at Fox saw the "Larry" shorts and contracted MacFarlane to create a series based on the characters entitled "Family Guy".
Fox proposed that MacFarlane complete a 15-minute short, and gave him a budget of $50,000.
Several aspects of "Family Guy" were inspired by the "Larry" shorts.
While working on the series, Larry and Steve slowly evolved into Peter and Brian.
After the pilot aired, the series was green-lit. 
MacFarlane or Macfarlane is a surname shared by:  Alan Macfarlane (born 1941), a professor of anthropological science at Cambridge University  Alexander Macfarlane (1851-1913), a Scottish-Canadian logician, physicist, and mathematician  Alexander Macfarlane (politician) (1818-1898), a Nova Scotia lawyer and politician  Alistair MacFarlane, British electrical engineer; leading academic; past Principal and Vice Chancellor of Heriot-Watt University, Edinburgh, and past Rector, University of the Highlands and Islands  Ian Macfarlane (economist), economist and former Governor of the Reserve Bank of Australia  Jean Macfarlane, American psychologist  John MacFarlane, the founder and CEO of Sonos, which makes digital audio equipment  John Edward Macfarlane, the editor of "Toronto Life" magazine  John Muirhead Macfarlane (1855–1943), a Scottish botanist and professor  Laura Macfarlane, rock and roll musician  Luke Macfarlane (b.
1980), Canadian actor  Malcolm MacFarlane (1853–1931), a Scottish Gaelic scholar and songwriter.
Neil Macfarlane, (b.
1936) a British Conservative politician and former Minister for Sport  Norman Macfarlane, Baron Macfarlane of Bearsden, (b.
1926) a British Conservative member of the House of Lords  Rachael MacFarlane (born 1976), a voice actress and sister of Seth MacFarlane  Robert Macfarlane (born 1976), a British travel writer, cultural historian, and literary critic  Robert MacFarlane (1835–1872), a lawyer and Liberal member of the Canadian House of Commons  Robert Macfarlane (New Zealand politician) (1900–1982), a Labour Party politician  Robert Gwyn Macfarlane, hæmatologist  Seth MacFarlane (born 1973), an American animator and voice actor, best known for his show "Family Guy" Macfarlane, Lang & Co., Ltd, a biscuit firm which merged with McVitie & Price to form United Biscuits  
On July 22, 2007, in an interview with "The Hollywood Reporter", MacFarlane announced that he may start working on a feature film, although "nothing's official."
In "TV Week" on July 18, 2008, MacFarlane confirmed plans to produce a theatrically released "Family Guy" feature film sometime "within the next year."
He came up with an idea for the story, "something that you could not do on the show, which him is the only reason to do a movie."
He later went to say he imagines the film to be "an old-style musical with dialogue" similar to "The Sound of Music", saying that he would "really be trying to capture, musically, that feel."
On October 13, 2011, Seth MacFarlane confirmed that a deal for a "Family Guy" film had been made, and that it would be written by himself and series co-producer Ricky Blitt.
On November 30, 2012, MacFarlane confirmed plans to produce a "Family Guy" film. 
Herbert was created by writer and voice actor Mike Henry.
Henry met "Family Guy" creator Seth MacFarlane when his brother, Patrick, and MacFarlane attended the Rhode Island School of Design.
Henry was invited to write and create characters for "Family Guy" after the show was picked up.
The first character he created was Cleveland Brown, and he later created Herbert.
Herbert was not originally a pedophile; Henry pitched the idea to the writers of the show, leading to the decision to make him one.
As with most of the other characters he created, Henry voices Herbert.
Henry based Herbert's voice and appearance on an elderly man he met when he worked in a grocery store when he was in high school.
In an interview Henry described that man as a sweet person. 
Kirker Butler is an American animation writer.
He has written and produced several episodes of the animated series "Family Guy", and has served as co-executive producer of "The Cleveland Show", another series by Family Guy creator Seth MacFarlane.