Answer the question at the end by quoting:

Kulwicki grew up in Greenfield, Wisconsin, a suburb of Milwaukee known for its Polish-American neighborhoods, near the Milwaukee Mile racetrack. After his mother died, his family moved in with his grandmother, who died when Kulwicki was in seventh grade. A year later, his only brother died of a hemophilia-related illness. Kulwicki attended Pius XI High School, a Roman Catholic high school in Milwaukee, and received a bachelor of science degree in mechanical engineering from the University of Wisconsin-Milwaukee in 1977.
Kulwicki began his racing career as a 13-year-old kart racer. His father built engines as the crew chief for Norm Nelson and Roger McCluskey's United States Automobile Club (USAC) racecars. Because his work involved travel, Kulwicki's father was unable to help his son at most kart races, so Kulwicki's resourcefulness was often tested trying to find someone to transport his kart to the track. Even when Kulwicki asked his father for advice, he typically ended up doing most of the work himself. "I showed him how", Gerry Kulwicki said. "And he said: 'Why don't you do it? You can do it better.' And I said, 'Well, if you do it for a while, you can do it better.'" Many local-level American racetracks host their own season championships. In Wisconsin, numerous locations held dirt and asphalt short track racing. Kulwicki started driving stock cars at the local level at the Hales Corners Speedway and Cedarburg Speedway dirt oval tracks. In 1973, he won the rookie of the year award at Hales Corners Speedway in the Milwaukee suburb of Franklin, and the next year started racing late models - the fastest and most complicated type of stock cars raced at the local level - at the same track. That season, he won his first feature race, at Leo's Speedway in Oshkosh. Kulwicki moved from dirt tracks to paved tracks in 1977. He also teamed up with racecar builder Greg Krieger to research, model, engineer, and construct an innovative car with far more torsional stiffness than other late models. The increased stiffness allowed the car to handle better in the corners, which increased its speed. Racing at Slinger Super Speedway, he won the track championship in 1977. In 1978, Kulwicki returned to Slinger; that same year he started racing a late model at Wisconsin International Raceway (WIR), finishing third in points in his rookie season at the track. In 1979 and 1980, he won the WIR late model track championships. In 1979, Kulwicki began competing in regional to national level events sanctioned by the USAC Stock Car series and the American Speed Association (ASA), while remaining an amateur racer through 1980. When Kulwicki raced against future NASCAR champion Rusty Wallace in the ASA series, the two became friends. Kulwicki's highest finish in the ASA season points championship was third place, which he accomplished in both 1982 and 1985, with five career victories and twelve pole positions.

when did Alan start racing?

Kulwicki began his racing career as a 13-year-old kart racer.

Answer the question at the end by quoting:

Daron Vartan Malakian (Armenian: Taron/Taron Vardan Malak'ean, born July 18, 1975) is an Armenian-American singer-songwriter, multi-instrumentalist, and record producer. He is best known as the guitarist, songwriter and second vocalist of the heavy metal band System of a Down and as the lead vocalist, lead guitarist and songwriter of the band Scars on Broadway. Daron Malakian is known for his distinctive playing and is ranked 40th in Loudwire's list of Top 50 Hard Rock + Metal Guitarists Of All Time and #11 in MusicRadar's poll, The 20 Greatest Metal Guitarists Ever.
In 2003, Daron Malakian (lead guitar and vocals), Greg Kelso (rhythm guitar), Casey Chaos (vocals), and Zach Hill (drums) recorded a demo tape entitled Ghetto Blaster Rehearsals, credited to the name Scars on Broadway. However, in 2007, an official letter appeared on the band's website that stated that these tracks are not in any way affiliated with Malakian's later project Scars on Broadway. Incidentally, these demo sessions produced "B.Y.O.B.", which would be a major hit for System of a Down in 2005. Following System's hiatus, Malakian announced his latest project - Scars on Broadway - a band which would include System of a Down bassist, Shavo Odadjian, and himself. Ultimately, Odadjian was not involved with the band, and instead System of a Down drummer, John Dolmayan became a member. After Malakian and Dolmayan experimented with different musicians (for a period of nine months in 2007 - 2008) the band took form and forged its sound in intense rehearsals and recording sessions (under Malakian's direction at his home studio and Sunset Sound) with musicians Danny Shamoun on keyboards, Dominic Cifarelli on bass, and Franky Perez on guitar and backing vocals for live performances (in the studio Malakian played nearly all the instruments with the exception of drums which were played by Dolmayan and some overdubs provided by the other members). The group released an eponymous album in 2008, which featured the hit single "They Say" (written by Malakian). However, shortly before the tour supporting the album, Malakian cancelled all scheduled concert and TV appearances, blaming a lack of enthusiasm and that his "heart wasn't into touring." This sudden cancellation prompted speculation and rumors that the band had broken up. It was the last that would be heard of Malakian for more than a year. In August 2009, Scars on Broadway, minus Malakian, traveled to Iraq for a USO tour across the U.S. army bases. Their setlist consisted of covers as well as a few Scars songs. Guitarist/vocalist Franky Perez stated on his Twitter that "the Scars tunes sound amazing but they're not the same without D..." He also stated before they left that Malakian had given them his blessing. In 2009 Franky Perez mentioned on his Twitter that he and the D-Man (Malakian) were going into studio to jam, this was the first news people have heard about Malakian's whereabouts for about a year. On May 2, 2010, Malakian reunited with Scars on Broadway at the Troubadour in West Hollywood. It was the first time he had performed with the band since October 2008. The group played songs from their album as well as new songs. Odadjian performed with the band for two songs, playing guitar. On February 24, 2012, System of a Down announced that the Scars on Broadway website is back online featuring a preview of a new song called "Guns Are Loaded".

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Malakian cancelled all scheduled concert and TV appearances, blaming a lack of enthusiasm and that his "heart wasn't into touring."