Question: What is the name of the musician known for his Hawaiian music and invented the mandolele?
Context: Helen Kapuailohia Desha Beamer (September 8, 1882 – September 25, 1952) was a musician, composer of songs in the Hawaiian language, hula dancer and coloratura soprano of Hawaiian ancestry.  Her descendents have also become accomplished artists in the U.S. state of Hawaii.  In 1928, her duet of the "Ke Kali Nei Au" with Sam Kapu Sr. on Columbia Records was the first commercial recording of the Charles E. King composition .  She was inducted into the Hawaiian Music Hall of Fame in 1995. The music of Hawaii includes an array of traditional and popular styles, ranging from native Hawaiian folk music to modern rock and hip hop.  Hawaii's musical contributions to the music of the United States are out of proportion to the state's small size.  Styles like slack-key guitar are well-known worldwide, while Hawaiian-tinged music is a frequent part of Hollywood soundtracks. Hawaii also made a contribution to country music with the introduction of the steel guitar.  In addition, the music which began to be played by Puerto Ricans in Hawaii in the early 1900s is called cachi cachi music, on the islands of Hawaii. Winona Kapuailohiamanonokalani Desha Beamer (August 15, 1923 – April 10, 2008) was a champion of authentic and ancient Hawaiian culture, publishing many books, musical scores, as well as audio and video recordings on the subject.  In her home state, she was known as Auntie Nona.  She was an early proponent of the ancient form of the hula being perpetuated through teaching and public performances.  Beamer was the granddaughter of Helen Desha Beamer.  A cousin to Hawaiian Music Hall of Fame inductee Mahi Beamer, she teamed with him and her brother Keola to form a touring North American troupe performing ancient hula and the Hawaiian art of storytelling.  She was a teacher at Kamehameha Schools for almost 40 years, but had been expelled from that same school as a student in 1937 for dancing the standing hula.  Beamer's sons Keola and Kapono are established performers in the Hawaiian music scene.  Her grandson Kamanamaikalani Beamer is a professor at the University of Hawaii at Manoa and CEO of the Kohala Center.  She ran a Waikiki hula studio for three decades.  In 1997—indignant at proposals to cut Hawaiian curriculum from Kamehameha Schools—Beamer became the catalyst for public protest and legal investigation into Bishop Estate management, which eventually led to the removal or resignation of the trustees. ‘Aunty’ Genoa Leilani Adolpho Keawe-Aiko (October 31, 1918 – February 25, 2008) was a Hawaiian musician.  Aunty Genoa was born on the island of Oʻahu in the Kakaʻako district of Honolulu and grew up in Lā'ie.  She was an icon in Hawaiian music and a mainstay on the Hawaiian music scene for more than 60 years.  With her tremendous voice she captivated audiences, kamaʻāina (locals) and malihini (visitors) alike.  With a tremendous repertoire of traditional Hawaiian standards and Hapa Haole tunes, she was without equal.  Many local artists include Aunty Genoa Keawe among their many influences. Princess Likelike and her siblings King David Kalākaua, Queen Liliʻ uokalani, and Crown Prince Leleiohoku II, were known as the Nā Lani ʻ Ehā (The Royal Four): aliʻi who were renowned as composers and champions of Hawaiian music in the latter half of the 19th century.  With Likelike's siblings, she led one of the three royal music clubs that held regular friendly competitions to outdo each other in song and poetry while she was alive. "" ʻ Āinahau"", the most famed of Likelike's works, was composed about the Cleghorn residence in Waikiki, the gathering place for Sunday afternoon musical get-togethers where she wrote most of her compositions.  She encouraged the musical education of her daughter, Princess Kaʻ iulani, and sponsored concerts and musical pageants.  The patronage she gave to young musicians and composers helped perpetuate Hawaiian music. "Honolulu City Lights" is a song composed by Hawaiian singer/songwriter Keola Beamer (b. 1951) in the 1970s which opens an album by the same name.  The album won several of the Hawaiian music industry's Na Hoku Hanohano Awards in 1979, among them that for Best Contemporary Hawaiian Album, and both song and album went on to become one of the most popular and most played works of contemporary Hawaiian music. John Kameaaloha Almeida (November 28, 1897 – October 9, 1985) was a blind musician and songwriter from Oahu, Hawaii.  His 1930s radio program on Hawaii radio station KGU earned him the sobriquet "The Dean of Hawaiian Music".  By the time of his death he had composed hundreds of meles that have today become Hawaiian music standards. Felix Mendelssohn’s Hawaiian Serenaders (also Felix Mendelssohn And His Hawaiian Serenaders), was a popular Hawaiian music band started by Felix Bartholdy Mendelssohn (19 September 19114 February 1952), is best known for making Hawaiian music popular in England and throughout Europe during the late 1930s and throughout the 1940s. Kuana Torres Kahele (born September 7, 1978) is a Hawaiian musician, vocalist, songwriter, record producer, dancer, and educator from Hilo, Hawaii.  Known primarily for his original acoustic compositions, Kahele arranges traditional Hawaiian music as well, performing and recording with instruments such as ukulele, guitar, ipu, and bass.  The majority of his lyrics are written and performed in the Hawaiian language.  After learning kane dancing and mele writing in his teens, in 1995 Kahele co-founded Nā Palapalai, a Hawaiian music group that has released seven albums.  Several have charted in the top five on the "Billboard" Top World Albums chart, and the group has won a large number of Nā Hōkū Hanohano Awards, including Group of the Year. Bill Griffin is widely known as a musician in both bluegrass and Hawaiian music genres.  A luthier and veteran mandolinist, he is also the inventor of the "mandolele", which is a nylon-stringed mandolin that he first crafted in 1986.  Born in Glendale, California, Griffin's first exposure to music came through his father, a pianist in a Dixieland jazz band.  Griffin began playing ukulele at age five, guitar soon thereafter, and mandolin at age nineteen.  He also plays piano and bass.
Answer: Bill Griffin