Question: How many series, of documentary series, of which Fossil Detectives was a spin off, have been broadcast ?
Context: A・C・G・T is a Japanese animation production company, founded in 2001 by former Triangle Staff members.  It has been involved in the development of many series, predominantly contributing to other studios and adapting works based on light novels and manga.  It is a subsidiary of OB Planning, who handles executive production on many of its series.  A.C.G.T also works regularly with Genco, who at times provides executive production while A.C.G.T completes animation production. Fossil Detectives is a 2008 BBC Television documentary series in which presenter Hermione Cockburn travels across Great Britain exploring fossil sites and discovering the latest scientific developments in geology and palaeontology.  The show is a spin-off of "Coast". Coast is a BBC documentary series first broadcast on BBC Two television in 2005.  A second series started on 26 October 2006, a third in early 2007 and a fourth in mid-2009.  It covers various subjects relating to both the natural and social history of the British coastline and also more recently, that of Britain's near neighbours.  A fifth series was aired in 2010, followed by a sixth in 2011.  A seventh series aired in 2012 and followed a different format from previous series.  Series eight started in 2013 while series nine aired in 2014 and series ten in 2015. First Life is a 2010 British nature documentary series written and presented by David Attenborough, also known by the expanded titles David Attenborough's First Life (UK) and First Life with David Attenborough (USA).  It was first broadcast in the USA as a two-hour special on the Discovery Channel on 24 October 2010.  In the United Kingdom it was broadcast as a two-part series on BBC Two on 5 November 2010.  "First Life" sees Attenborough tackle the subject of the origin of life on Earth.  He investigates the evidence from the earliest fossils, which suggest that complex animals first appeared in the oceans around 540 million years ago, an event known as the Cambrian Explosion.  Trace fossils of multicellular organisms from an even earlier period, the Ediacaran biota, are also examined.  Attenborough travels to Canada, Morocco and Australia, using some of the latest fossil discoveries and their nearest equivalents amongst living species to reveal what life may have been like at that time.  Visual effects and computer animation are used to reconstruct and animate the extinct life forms. Lost Worlds, Vanished Lives is a four-part BBC documentary series concerning the discovery of fossils.  It is written and presented by David Attenborough, produced by Mike Salisbury, and was originally broadcast in April 1989.  It was made in between the second and third instalments of Attenborough's "Life" series: "The Living Planet" and "The Trials of Life", respectively.  The study of rocks and their ancient secrets was something of a boyhood passion for David Attenborough.  In these programmes, his enthusiasm for the subject is undiminished.  With the help of expert palaeontologists, fossil hunters and (for the time) modern animation techniques, Attenborough attempts to show how life evolved in Earth's distant past.  To do so, he travels the globe to visit the world's most famous fossil sites. Doug McConnell is a television journalist who has focused on environmental issues, with programs on the air continuously since 1982.  He has created, produced and hosted many series, special programs, and news projects for local, national and international distribution.  His broadcast awards include multiple Emmys, an Iris, and a Gabriel. The Detectives is a British television documentary series that first aired in 2015.  The first series was broadcast on BBC Two as a three-part documentary series airing over three consecutive nights from 17 May 2015.  The first series followed investigators at Greater Manchester Police's sex crimes unit, focusing on the investigation into historical sex crimes committed by disc jockey Ray Teret, and his subsequent trial and conviction for those offences.  A second, four-part series, titled "The Detectives: Murder on the Streets" began airing on 20 September 2017, this time shadowing members of Greater Manchester's Murder Investigation Team. The AACTA Award for Best Documentary Series, is a non-feature film award presented by the Australian Academy of Cinema and Television Arts (AACTA) to the producer of an Australian documentary series that is "a Television Program consisting of a potentially unlimited number of episodes but not less than 2 that is a creative treatment of actuality other than a news, current affairs, sports coverage, magazine, infotainment or light entertainment program."  Prior to the establishment of the Academy in 2011, the award was presented by the Australian Film Institute (AFI) at the annual Australian Film Institute Awards (more commonly known as the AFI Awards) from 2009–2010.  A single award for Best Documentary was handed out from 1958–2008, before it was split into three categories: Best Feature Length Documentary, Best Documentary Under One Hour and Best Documentary Series.  The award is presented at the AACTA Awards Luncheon, a black tie event which celebrates achievements in film production, television, documentaries and short films. The television in Greece began in 1966.  Nevertheless the first TV series was aired in 1970 and was the series "To Spiti me ton Foinika", aired by YENED.  The next series was "O Kyrios Synigoros" in the same year.  The first years of television there were only public channels.  The first channels were the channel EIR and the TED, the channel of armed forces.  Few years later TED renamed to YENED and EIR became EIRT.  The public channels renamed again after the coming of PASOK in the power and they became ERT1 and ERT2.  Famous TV-series of the period of public television are: "O Agnostos Polemos", "I Geitonia Mas", "Louna Park", "Christ Recrucified", "Methoriakos Stathmos", "oi Pantheoi".  In 1989, Greek television entered in a new period, the period of private television.  The first private TV channels started to broadcast in 1989.  After the creation of private channels the most series were played by them.  The period 1995–2009 is the best period of the Greek television and frequently characterized as the golden age of the Greek TV.  Then, many series were shot with expensive productions.  After 2010, the Greek debt crisis affected the Greek television and the productions decreased dramatically. Shardul Rathod is an Indian film writer, born on 1 July 1968.  He is working for entertainment as Screenwriter & film director since 2003. He was born in Delhi.  He done PhD in Hindi.  He knows many languages – Hindi, English, Urdu, Rajasthani and Brij.  He is shifted to Mumbai in 2003 and started working in Indian film industry as scrript writer.  He has done so many musical album with T-series and with anup jalota.  He has done more than six animation films for kids for Ladmark Toonz Hydrabad India, He specialises in action comedy films, he has written many series for small screen,
Answer: ten