Question: Who is the father of the composer of song Ett Gammalt Fult Och Elakt Troll Det Var En Gång?

Knowledge 1: Ett gammalt fult och elakt troll det var en gång
"Ett gammalt fult och elakt troll det var en gång" known also for the shorter title "Det var en gång" (meaning "Once upon a time") is a traditional Swedish children's song, with music and lyrics by Felix Körling.Using references to several geographical locations, the song lyrics describe a troll, his wife and cat arriving to Sweden.The song was first published in the collection "Misse-Måns och andra visor" in 1918.An early recording of the song was made by Märta Ekström, with Otto Nordlund accompanying on the piano was performed on December 16, 1929, and released on a single in December 1930, entitled "Det var en gång" alongside the song "Precis somi sagan" again composed by Felix Körling.More recently, the song was recorded by Peter Himmelstrand and released in 1978.Ingeborg (Immi) Hellén wrote lyrics in Finnish. [SEP] Knowledge 2: Felix Körling
John "Felix" August Körling, born 17 December 1864, in Kristdala, Sweden, dead 8 January 1937 in Halmstad, Sweden, was a Swedish composer, church musician and music teacher.He was the brother of Sven Körling, son of August Körling and father of American photographer Torkel Korling.Felix Körling also wrote children's songs.
Knowledge 1: Ett gammalt fult och elakt troll det var en gång
"Ett gammalt fult och elakt troll det var en gång" known also for the shorter title "Det var en gång" (meaning "Once upon a time") is a traditional Swedish children's song, with music and lyrics by Felix Körling.Using references to several geographical locations, the song lyrics describe a troll, his wife and cat arriving to Sweden.The song was first published in the collection "Misse-Måns och andra visor" in 1918.An early recording of the song was made by Märta Ekström, with Otto Nordlund accompanying on the piano was performed on December 16, 1929, and released on a single in December 1930, entitled "Det var en gång" alongside the song "Precis somi sagan" again composed by Felix Körling.More recently, the song was recorded by Peter Himmelstrand and released in 1978.Ingeborg (Immi) Hellén wrote lyrics in Finnish. [SEP] Knowledge 2: Det var en yndig tid
" Det var en yndig tid"( It was a lovely time) was the Danish entry in the Eurovision Song Contest 1960, performed in Danish by Katy Bødtger.The song was performed fourth on the night, following Luxembourg's Camillo Felgen with" So laang we's du do bast" and preceding Belgium's Fud Leclerc with" Mon amour pour toi".At the close of voting, it had received 4 points, placing 10th in a field of 13.The song deals with the" good old days", describing them as a time when courting was much simpler.The description is of life" in the king's old city", which is never named but may have been Copenhagen, given the provenance of the song.It was succeeded as Danish representative at the 1961 Contest by Dario Campeotto with" Angelique".
Knowledge 1: Ett gammalt fult och elakt troll det var en gång
"Ett gammalt fult och elakt troll det var en gång" known also for the shorter title "Det var en gång" (meaning "Once upon a time") is a traditional Swedish children's song, with music and lyrics by Felix Körling.Using references to several geographical locations, the song lyrics describe a troll, his wife and cat arriving to Sweden.The song was first published in the collection "Misse-Måns och andra visor" in 1918.An early recording of the song was made by Märta Ekström, with Otto Nordlund accompanying on the piano was performed on December 16, 1929, and released on a single in December 1930, entitled "Det var en gång" alongside the song "Precis somi sagan" again composed by Felix Körling.More recently, the song was recorded by Peter Himmelstrand and released in 1978.Ingeborg (Immi) Hellén wrote lyrics in Finnish. [SEP] Knowledge 2: Alonso Mudarra
Alonso Mudarra( c. 1510 – April 1, 1580) was a Spanish composer of the Renaissance, and also played the vihuela, a guitar- shaped string instrument.He was an innovative composer of instrumental music as well as songs, and was the composer of the earliest surviving music for the guitar.

Answer: August Körling