Question: Herb Metoyer is a Detroit-based singer-songwriter and novelist, best known for his folk music , he was an early mentor to, and lifelong influence on, Mike Taylor, who performed extensively with Henry John Deutschendorf Jr., an American singer-songwriter, record producer, actor, activist, and humanitarian, whose greatest commercial success was as a solo singer, known professionally as John Denver, died on which date?

full_context: Document 1: Merle Travis: Merle Robert Travis (November 17, 1917 – October 20, 1983) was an American country and western singer, songwriter, and guitarist born in Rosewood, Kentucky. His song's lyrics often discussed both the lives and the economic exploitation of American coal miners. Among his many well-known songs are "Sixteen Tons," "Re-Enlistment Blues," "I am a Pilgrim," and "Dark as a Dungeon." However, it is his unique guitar style, still called Travis Picking by guitarists, as well as his interpretations of the rich musical traditions of his native Muhlenberg County, Kentucky, for which he is best known today. "Travis Picking" is a syncopated style of guitar fingerpicking rooted in ragtime music in which alternating chords and bass notes are plucked by the thumb while melodies are simultaneously plucked by the index finger. He was inducted into the Nashville Songwriters Hall of Fame in 1970 and elected to the Country Music Hall of Fame in 1977.
Document 2: John Denver's Greatest Hits: John Denver's Greatest Hits was American singer-songwriter John Denver's first compilation album, released in late 1973 for the holiday shopping season. A version known as The Best of John Denver with the same track listing was released in some countries.
Document 3: Rocky Mountain High: "Rocky Mountain High" is a folk rock song written by John Denver and Mike Taylor about Colorado, and is one of the two official state songs of Colorado. Recorded by Denver in 1972, it went to #9 on the US Hot 100 in 1973. (The song also made #3 on the Easy Listening chart, and was played by some country music stations.) Denver told concert audiences in the mid-1970s that the song took him an unusually long nine months to write. On April 10, 2017 the song was certified Gold by the Recording Industry Association of America for sales of 500,000 digital downloads.
Document 4: Herb Metoyer: Herb Metoyer is a Detroit-based singer-songwriter and novelist, best known for his folk music and other work involving New Orleans and Louisiana. He was an early mentor to, and lifelong influence on, Mike Taylor, who performed extensively with John Denver and co-wrote the song Rocky Mountain High.
Document 5: Ernest Hebert: Ernest Hebert (born May 4, 1941) is an American author. He is best known for the Darby series, seven novels written between 1979 and 2014, about modern life in a fictional New Hampshire town as it transitions from relative rural poverty to being more upscale, almost suburban.
Document 6: The Music Is You: A Tribute to John Denver: The Music Is You: A Tribute To John Denver is an album consisting of songs originally performed by country and folk singer-songwriter John Denver. It was released on April 2, 2013 by ATO Records. Denver died in October 1997 when the single engine plane he was piloting crashed off the coast of California. The album has been praised by some as a way to help Denver's catalogue reach a new, younger audience.
Document 7: Big Rock Candy Mountain: "Big Rock Candy Mountain", first recorded by Harry McClintock in 1928, is a Bluegrass song about a hobo's idea of paradise, a modern version of the medieval concept of Cockaigne. It is a place where "hens lay soft boiled eggs" and there are "cigarette trees." McClintock claimed to have written the song in 1895, based on tales from his youth hoboing through the United States, but some believe that at least aspects of the song have existed for far longer. It is catalogued as Roud Folk Song Index No. 6696.
Document 8: Herb Bermann: Herb Bermann is an American lyricist, screenwriter, and actor. He is best known for co-writing the 1967 debut album "Safe as Milk" for Captain Beefheart and His Magic Band. A screenplay he co-wrote with Dean Stockwell became the inspiration for Neil Young's 1970 album "After the Gold Rush". A book featuring his known and previously unpublished lyrics, "The Mystery Man from the Magic Band", was published in 2015 by Brass Tacks Press.
Document 9: Denny Doherty: Dennis Gerrard Stephen Doherty (November 29, 1940 – January 19, 2007) was a Canadian singer, songwriter, musician and actor. He was most widely known as a founding member of the 1960s musical group The Mamas & the Papas.
Document 10: Keith Hetrick: Keith Justin Hetrick is a Grammy-nominated songwriter and record producer currently based in Nashville, TN. He has worked with notable artists such as Charlie Wilson, Boyz II Men, Snoop Dogg, Shaggy, T.I., Pitbull, Fifth Harmony, Cher Lloyd, Aston Merrygold, Silentó, The Jacksons, Ray Parker Jr., Teddy Riley, Paulina Rubio, Sophia Grace, Inna.
Document 11: Rocky Top: "Rocky Top" is an American country and bluegrass song written by Felice and Boudleaux Bryant in 1967 and first recorded by the Osborne Brothers later that same year. The song, which is a city-dweller's lamentation over the loss of a simpler and freer existence in the hills of Tennessee, is one of Tennessee's ten official state songs and has been recorded by dozens of artists from multiple musical genres worldwide since its publication. In U.S. college athletics, "Rocky Top" is associated with the Tennessee Volunteers of the University of Tennessee (UT), whose Pride of the Southland Band has played a marching band version of the song at the school's sporting events since the early 1970s.
Document 12: Johnny Cash: John R. Cash (born J. R. Cash; February 26, 1932 – September 12, 2003) was an American singer-songwriter, guitarist, actor, and author. He is widely considered one of the most influential popular musicians of the 20th century and is one of the best-selling music artists of all time, having sold more than 90 million records worldwide. Although primarily remembered as a country music icon, his genre-spanning songs and sound embraced rock and roll, rockabilly, blues, folk, and gospel. This crossover appeal won Cash the rare honor of multiple inductions in the Country Music, Rock and Roll, and Gospel Music Halls of Fame.
Document 13: An Evening with John Denver: An Evening with John Denver is a live album of music that was performed by American singer-songwriter John Denver. It was recorded at the Universal Amphitheatre in Los Angeles, California in August and September 1974. He was backed by an orchestra conducted by Lee Holdridge. Denver's manager, Milton Okun, was the album's music producer.
Document 14: Neil Diamond: Neil Leslie Diamond (born January 24, 1941) is an American singer-songwriter, musician and actor. One of the world's best-selling artists of all time, he has sold over 135 million records worldwide since the start of his career in the 1960s. With 38 songs in the Top 10, he is the second most successful artist in the history of the "Billboard" Adult Contemporary Top 10 charts. His songs have been covered internationally by performers from a variety of musical genres.
Document 15: John Denver: Henry John Deutschendorf Jr. (December 31, 1943 – October 12, 1997), known professionally as John Denver, was an American singer-songwriter, record producer, actor, activist, and humanitarian, whose greatest commercial success was as a solo singer. After traveling and living in numerous locations while growing up in his military family, Denver began his music career with folk music groups during the late 1960s. Starting in the 1970s, he was one of the most popular acoustic artists of the decade and one of its best-selling artists. By 1974, he was firmly established as America's best selling performer, and AllMusic has described Denver as "among the most beloved entertainers of his era".
ground_truth: October 12, 1997