Question: Who is the sister of the composer of L.A.?

full_context: Document 1: 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.
Document 2: 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 3: Time Fades Away: Time Fades Away is a 1973 live album by Canadian musician Neil Young. Consisting of previously unreleased material, it was recorded with The Stray Gators on the support tour following 1972's highly successful "Harvest". Due to Young's dissatisfaction with the tour, it was omitted from his catalogue and not released on CD until 2017.
Document 4: 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 5: 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 6: 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 7: 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 8: 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 9: Life (Neil Young & Crazy Horse album): Life is an album by Canadian musician Neil Young and his backing band Crazy Horse, and it is Young's last release on the Geffen label. As with their 1979 album "Rust Never Sleeps", Young and the Horse performed most of this album's songs live with the exceptions of "Cryin' Eyes" and "We Never Danced" which were recorded in studio. The album was released on July 6, 1987.
Document 10: 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 11: William T. Young: William T. Young attended the University of Kentucky where he was a member of the Sigma Alpha Epsilon fraternity. Young graduated with high distinction in 1939 with a Bachelor of Science in mechanical engineering. After a short employment with Bailey Meter in Cleveland, Ohio, he served as a captain in the United States Army from 1941 to 1945.
Document 12: Loser (Beck song): Referred to as a ``stoner rap ''by AllMusic's Stephen Thomas Erlewine, the lyrics are mostly nonsensical. The song's chorus, in which Beck sings the lines`` Soy un perdedor / I'm a loser baby, so why do n't you kill me?'', is often interpreted as a parody of Generation X's ``slacker ''culture. Beck has denied the validity of this meaning, instead saying that the chorus is simply about his lack of skill as a rapper. Jon Pareles wrote in The New York Times that`` The sentiment of 'Loser' (...) reflects the twentysomething trademark, a mixture of self - mockery and sardonic defiance'', noting Beck's ``offhand vocal tone and free - associative lyrics ''and comparing his vocals to`` Bob Dylan talk - singing''. After its recording, Beck thought that the song was interesting but unimpressive. He later said, ``The raps and vocals are all first takes. If I'd known the impact it was going to make, I would have put something a little more substantial in it. ''The relationship between Beck and Stephenson soured after the release of`` Loser'' as a single. Stephenson regretted his involvement in creating the song, in particular the ``negative ''lyrics, saying`` I feel bad about it. It's not Beck the person, it's the words. I just wish I could have been more of a positive influence.''
Document 13: The Needle and the Damage Done: "The Needle and the Damage Done" is a song by Neil Young that describes the destruction caused by the heroin addiction of musicians he knew including his friend and Crazy Horse bandmate Danny Whitten. It previews the theme of the "Tonight's the Night" album that reflects Young's grief over the heroin overdose and death of both Whitten and Bruce Berry, a roadie for Young and Crazy Horse.
Document 14: Hey Hey, My My (Into the Black): Sheff: You disagree with Neil Young's lyric in Rust Never Sleeps: ``It's better to burn out than to fade away... ''
Document 15: 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".
ground_truth: Astrid Young
sub_queries: L.A. >> composer Answer: Neil Young
Neil Young >> sibling Answer: Astrid Young