Question: Who is the sibling of the soloist on The Loner?

full_context: Document 1: L.A. (Neil Young song): Johnny Rogan in his "Complete Guide to the Music of Neil Young" tells us that "L.A." was "Young's fantasy vision of the destruction of Los Angeles. There is an underlying glee in his apocalyptic vision that is both intriguing and disconcerting." Rogan also suggests that the song may have been written by Young a full five years before it was debuted during his 1973 "Time Fades Away" tour. Rogan talks about the song at greater length in the book "Neil Young: Zero To Sixty".
Document 2: Such a Lonely One: "Such a Lonely One" is a single by Canadian country music group Prairie Oyster. Released in 1994, it was the first single from their album "Only One Moon". The song reached #1 on the "RPM" Country Tracks chart in June 1994.
Document 3: The Loner (Neil Young song): "The Loner" is a song by Neil Young, his first solo single. It was released on his solo debut album in November 1968, and then an edited version as his debut solo single three months later on Reprise Records. It missed the "Billboard" Hot 100 chart completely, but over time has become a staple of his performance repertoire. Both it and "Sugar Mountain", its B-side recorded live at the Canterbury House in Ann Arbor, Michigan, were released on album together for his 1977 compilation, "Decade".
Document 4: Nick Sagan: Nick Sagan (born September 16, 1970 in Boston, Massachusetts) is an American novelist and screenwriter. He is the author of the science fiction novels "Idlewild", "Edenborn", and "Everfree", and his screen credits include episodes of "" and "". He is the son of astronomer Carl Sagan and artist and writer Linda Salzman.
Document 5: Jock Young: Jock Young was educated at the London School of Economics. His PhD was an ethnography of drug use in Notting Hill, West London, out of which he developed the concept of moral panic. The research was published as "The Drugtakers". He was a founding member of the National Deviancy Conferences and a group of critical criminologists in which milieu he wrote the groundbreaking, "The New Criminology: For a Social Theory of Deviance" in 1973, with Ian Taylor and Paul Walton and "The Manufacture of News" (with Stan Cohen).
Document 6: William Young (Nova Scotia politician): Born in Falkirk, the son of John Young and Agnes Renny, Young was first elected to the Nova Scotia House of Assembly in 1836 as a Reformer (or Liberal) and, as a lawyer, defended Reform journalists accused of libel. When responsible government was instituted in 1848, Young hoped to become the first Premier but was passed over in favour of fellow reformer James Boyle Uniacke and Young became Speaker. However, Young succeeded Uniacke in 1854.
Document 7: Scott Young (writer): Scott Alexander Young (April 14, 1918 – June 12, 2005) was a Canadian journalist, sportswriter, novelist and the father of musicians Neil Young and Astrid Young. Over his career, Young wrote 45 books, including novels and non-fiction for adult and youth audiences.
Document 8: Old Man (song): ``Old Man ''is a song written and performed by Neil Young on his 1972 album Harvest.`` Old Man'' was released as a single on Reprise Records in the spring of 1972, and reached # 31 on the Billboard Hot 100 singles chart for the week ending June 3.
Document 9: John Walter Scott: John Walter Scott (November 2, 1845 – January 4, 1919) of New York City, was originally from England, but he emigrated to the United States to take part in the California Gold Rush. Unsuccessful at the prospecting trade, Scott began to sell postage stamps for collectors and in a short period of time became the nation's leading stamp dealer. During his lifetime, he was known as "The Father of American Philately" by his fellow stamp collectors.
Document 10: Sugar Mountain (song): "Sugar Mountain" is a song by Canadian folk rock singer and composer Neil Young. Young composed the song on November 12, 1964—his 19th birthday—at the Victoria Hotel in Fort William, Ontario (now Thunder Bay), where he had been touring with his Winnipeg band the Squires. Its lyrics are reminiscences about his youth in Winnipeg, Manitoba.
Document 11: Jacob Richler: Jacob Richler is a Canadian newspaper and magazine journalist, and the son of novelist Mordecai Richler and Florence Isabel (Wood). He was the inspiration for his father's "Jacob Two-Two" trilogy of children's books.
Document 12: Phonograph record: In 1968, Reprise planned to release a series of 78 rpm singles from their artists on their label at the time, called the Reprise Speed Series. Only one disc actually saw release, Randy Newman's I Think It's Going to Rain Today, a track from his self-titled debut album (with The Beehive State on the flipside). Reprise did not proceed further with the series due to a lack of sales for the single, and a lack of general interest in the concept. Guitarist & vocalist Leon Redbone released a promotional 78 rpm record in 1978 featuring two songs (Alabama Jubilee and Please Don't Talk About Me When I'm Gone) from his Champagne Charlie album. In 1980 Stiff Records in the United Kingdom issued a 78 by Joe "King" Carrasco containing the songs Buena (Spanish for "good," with the alternate spelling "Bueno" on the label) and Tuff Enuff. Underground comic cartoonist and 78 rpm record collector Robert Crumb released three discs with his Cheap Suit Serenaders in the 1980s.
Document 13: Neo (album): Neo is a 1979 debut solo album by the American punk musician Ian North. It was recorded in 1978 in Ian Gillan's studio and released in 1979 by Aura Records. Although the album was released as a solo work of Ian North, he recorded it with three session musicians: Steve Byrd on guitar, John McCoy on drums and Bryson Graham on drums and they later formed Neo, as a "semi-band", because they were paid by North. Many songs were written by North while the band comprised him and the brothers Robin and Paul Simon. This line-up, the band's first played a gig during 1977. In early 1978, Robin Simon left to join Ultravox and, shortly afterwards, his brother Paul was sacked by North and joined Cowboys International.
Document 14: Decade (Neil Young album): Decade is a compilation album by Canadian musician Neil Young, originally released in 1977 as a triple album, now available on two compact discs. It contains 35 of Young's songs recorded between 1966 and 1976, among them five tracks that had been unreleased up to that point. It peaked at No. 43 on the "Billboard" Top Pop Albums chart, and was certified platinum by the RIAA in 1986.
Document 15: James Young (Upper Canada politician): He was born in Nova Scotia in 1777 and settled in Ameliasburgh Township in Upper Canada. In 1808, he was named justice of the peace in the Midland District. He served in the local militia during the War of 1812 and became lieutenant colonel in 1824. He represented Hastings & Ameliasburg in the 6th Parliament of Upper Canada. He died at Carrying Place in 1831.
ground_truth: Astrid Young
sub_queries: The Loner >> performer Answer: Neil Young
Neil Young >> sibling Answer: Astrid Young