Question: What band did Sedan Delivery writer Neil Young join in 1969?
Context: A sedan delivery, commonly called a delivery in American English and a car derived van in British English, is a two-door station wagon with driver and front passenger seats or driver's only seat, and steel sheet-metal panels in place of rear side windows.  Sedan deliveries have spartan interior trim and were used by businesses ranging from plumbers, couriers and local merchants such as bakeries as cargo vans are used today. Unique to Canada, the Pontiac Pathfinder is an entry-level station wagon or full sized car that was based on a Chevrolet chassis but used most of the distinctive Pontiac styling parts.  Engines were also produced by Chevrolet, another General Motors brand.  The use of Chevrolet-based bodies resulted in shorter front and rear fenders and Canadian specific wheels and hubcaps.  Interior trim often was also unique to Canada.  The last Pathfinders were built in 1958 as Pontiac's (Canada) base model.  Body styles included a sedan delivery.  This car was Pontiac's last full-size sedan delivery.  Also there was the station wagon model. Neil Young Journeys is a 2011 American concert documentary film produced and directed by Jonathan Demme, featuring Neil Young and produced for Sony Pictures Classics.  It is, along with "" (2006) and "Neil Young Trunk Show" (2009), part of a Neil Young trilogy being created by Demme. Pegi Morton Young (born December 1, 1952) is an American singer-songwriter, environmentalist, educator and philanthropist.  Until recently, she lived in Northern California with her ex-husband, Neil Young, with whom she has one step-son, Zeke Young, and two biological children, Ben Young and Amber Young.  Pegi's debut as a singer came in 1983 when she was a member of The Pinkettes, the backing singers of Neil Young's Rock-a Billy Shocking Pinks tour.  Later in 1994 she made her first nationwide TV appearance at the Academy Awards, singing backup on the song "Philadelphia," composed by her husband.  In July 2014, Neil Young filed for divorce in California. A panel van (or panelvan) is a form of solid (rigid-bodied, non-articulated) van, smaller than a lorry or truck, without rear side windows.  In the U.K., this body style is referred to as a "car-derived van", and in American as a "sedan delivery".  Panel vans are widely used in many parts of the world for transporting cargo.  In some national usages it is distinct from a purpose-designed van in that it is based on the chassis of a family car design.  In places where they are distinct from a "van", they have less cargo space but better agility and maneuverability, making them particularly suited for cities with narrow streets or heavy traffic. Gary Burden is an American artist specializing in the field of album covers.  He is considered as one of the pioneers of the concept of album cover art.  In the 1960s and 1970s he designed covers for many rock stars, such as Mama Cass, Crosby Stills Nash and Young, Joni Mitchell, The Doors, The Eagles and Jackson Browne.  He created album covers for Neil Young for 35 years.  His works were nominated four times for the Grammy Awards.  and in 2010, he won the 52nd Grammy Awards for Best Boxed or Special Limited Edition Packaging for the Neil Young "The Archives Vol.  1 1963–1972".  The titles of creative director, art director and designer are mutually shared amongst Gary Burden, Jenice Heo and Neil Young who collaborated throughout the design process. In Australia, panel vans were a development of the Australian "ute" (utility), a variety of pickup based on a car chassis.  In the U.K., this body style is referred to as a "car-derived van", and in American as a "sedan delivery".  The first panel vans were manufactured locally by Holden and Ford Australia in the late 1950s, but did not become popular until the mid-1960s.  Other foreign brands of enclosed vans manufactured or assembled in Australia included Volkswagen, Morris Minor, and Chrysler.  Panel vans enjoyed tremendous popularity in Australia throughout the 1970s, but by the late 1980s, they began to slowly disappear from Australian roads as demand fell and major manufacturers slowly ceased building them. Neil Percival Young, {'1': ", '2': ", '3': ", '4': "} (born November 12, 1945), is a Canadian singer-songwriter, musician, producer, director and screenwriter.  After embarking on a music career in the 1960s, he moved to Los Angeles, where he formed Buffalo Springfield with Stephen Stills, Richie Furay and others.  Young had released two solo albums by the time he joined Crosby, Stills & Nash in 1969, in addition to two as a member of Buffalo Springfield.  From his early solo albums and those with his backing band Crazy Horse, Young has recorded a steady stream of studio and live albums, sometimes warring with his recording company along the way. The Chevrolet Delray, named after Delray Beach, Florida, debuted in 1954 as an optional trim level on two-door models of Chevrolet's mid-range 210 series of full-size car.  In 1958, it became a distinct series of its own at the bottom of Chevy's lineup (replacing the discontinued 150), and added a four-door sedan, and sedan delivery, but it only remained in production for that model year. "Sedan Delivery" is a song written by Neil Young that was first released on his 1979 album with Crazy Horse, "Rust Never Sleeps".
Answer: Crosby, Stills & Nash