Question: What year was the man whose music inspired Folias Flute and Guitar Duo born?

Context articles: Music Inspired by Watership Down
The Send
Gertrude Abercrombie
Astor Piazzolla
Masiakasaurus
Rodrigo y Gabriela
Folias Flute and Guitar Duo
Tango music
Czech Guitar Duo
Kaltchev Guitar Duo

Music Inspired by Watership Down is a progressive rock album by Swedish musician Bo Hansson.
 The album is Hansson's fourth solo album and is, as its name suggests, built around musical ideas inspired by Richard Adams' heroic fantasy novel "Watership Down".
 It was the second album of Hansson's to have been based on a novel; his first solo album, "Music Inspired by Lord of the Rings", had likewise been based on J. R. R. Tolkien's "The Lord of the Rings".
 Hansson had already composed and released a musical suite inspired by "Watership Down" on his previous album "Attic Thoughts".
 However, beyond its title, the "Music Inspired by Watership Down" album contains few overt references to the novel and instead features excerpts from the works of various poets, such as John Keats and Alexander Pope.
The Send was an alternative rock project of Falling Up ex-guitarist, Joseph A. Kisselburgh of Albany, Oregon, currently signed to Tooth & Nail Records.
 His debut album, "Cosmos", was released on July 31, 2007.
 Before this was even released, though, his song, "The Fall", was featured on "Charlotte's Web: Music Inspired By The Motion Picture", a compilation album with music inspired by the 2006 movie of Charlotte's Web.
 On June 23 The Send began a winter retreat with labelmate, Hawk Nelson, around Major League Baseball venues.
 The first single off "Cosmos" was "An Epiphany," which quickly gained some success, reaching No. 5 on Christian Hit Radio.
Gertrude Abercrombie (February 17, 1909 – July 3, 1977) was an American painter based in Chicago.
 Called "the queen of the bohemian artists", Abercrombie was involved in the Chicago jazz scene and was friends with musicians such as Dizzy Gillespie, Charlie Parker, and Sarah Vaughan, whose music inspired her own creative work.
Astor Pantaleón Piazzolla (] , ] ; March 11, 1921July 4, 1992) was an Argentine tango composer, bandoneon player, and arranger.
 His oeuvre revolutionized the traditional tango into a new style termed "nuevo tango", incorporating elements from jazz and classical music.
 A virtuoso bandoneonist, he regularly performed his own compositions with a variety of ensembles.
Masiakasaurus is a genus of small predatory theropod dinosaurs from the Late Cretaceous of Madagascar.
 In Malagasy, "masiaka" means "vicious"; thus, the genus name means "vicious lizard".
 The type species, Masiakasaurus knopfleri, was named after the musician Mark Knopfler, whose music inspired the expedition crew.
 It was named in 2001 by Scott D. Sampson, Matthew Carrano, and Catherine A. Forster.
 Unlike most theropods, the front teeth of "M. knopfleri" projected forward instead of straight down.
 This unique dentition suggests that they had a specialized diet, perhaps including fish and other small prey.
 Other bones of the skeleton indicate that "Masiakasaurus" were bipedal, with much shorter forelimbs than hindlimbs.
 "M. knopfleri" reached an estimated adult body length of around 2 m .
Rodrigo y Gabriela (Rodrigo and Gabriela) are a Mexican classical guitar duo whose music is influenced by a number of genres including nuevo flamenco, rock, and heavy metal.
 The duo's recordings consist largely of instrumental duets on the flamenco guitar.
 Currently residing in Mexico City, they began their career in Dublin, Ireland, during an eight-year stay.
 They have released five studio albums, three live albums and one EP.
 In 2011 they collaborated with Hans Zimmer on the while also contributing to the soundtrack for the "Shrek" prequel "Puss in Boots".
 They have toured internationally and in May 2010, performed at The White House for President Barack Obama.
Folias Flute and Guitar Duo is an American performer/composer chamber music duo group consisting of flutist Carmen Maret and guitarist Andrew Bergeron.
 Bergeron and Maret met at Michigan State University while finishing their Master’s Degrees in Music and they were married in 2003.
 The formation of the duo was brought about by a mutual inspiration for the music of Astor Piazzolla and through their work as Argentine tango dance band leaders.
Tango is a style of music in  or  time that originated among European immigrant populations of Argentina (collectively, the "Rioplatenses").
 It is traditionally played on a solo guitar, guitar duo, or an ensemble, known as the "orquesta típica", which includes at least two violins, flute, piano, double bass, and at least two bandoneóns. Sometimes guitars and a clarinet join the ensemble.
 Tango may be purely instrumental or may include a vocalist.
 Tango music and dance have become popular throughout the world.
Czech Guitar Duo was established by Jana Bierhanzlová and Petr Bierhanzl in 1975 at the Prague Conservatory.
 They play both classical guitar music and flamenco.
 They have given over three thousand live performances, and released three recordings on CD and DVD, as well as numerous radio and TV recordings.
 Czech Guitar Duo is the longest playing ensemble of their kind on the Czech concert scene.
Kaltchev Guitar Duo is a guitar duo from Bulgaria.