Question: What type of musical profession does Toshiko Koshijima and Rob Swire have in common?

full_context: Document 1: Pnau: Pnau stylised as PNAU is an Australian dance music trio originating from Sydney, Australia. The trio, a duo before 2016, consists of musicians Nick Littlemore (vocals, production), Peter Mayes (guitar, production) and Sam Littlemore (production), with Sam joining in 2016. The pair have achieved multiple successes throughout their career with their award-winning debut album "Sambanova", their widely acclaimed 2007 release "Pnau". Pnau is also recognized for their heavily publicized apprenticeship under musician Elton John, who signed the duo after listening to their record "Pnau". Several of Pnau's recent projects have featured John's involvement, such as Pnau's album "Soft Universe" and an album featuring Pnau recreations of Elton John's hits called "Good Morning to the Night".
Document 2: Toshiki Kadomatsu: Toshiki Kadomatsu (角松敏生 , Kadomatsu Toshiki ) (born 12 August 1960) is a Japanese rock/R&B singer-songwriter, musician, and producer. He has released many studio albums, as well as several instrumental and live albums. He studied Philosophy at Nihon University. He has been active since at least 1981 and is still active, having released his most recent album in March 2012. In 1987 he released the hit instrumental album "SEA IS A LADY" which charted at #4. He has written and produced music for other artists, including "You're My Only Shinin' Star" by Miho Nakayama, which reached #1 on the Oricon weekly charts and stayed there for 18 weeks. He composed the music for the 2002 film "Shiroi-fune".
Document 3: Andy C: Andrew Clarke, known by his stage name Andy C, is an English DJ, record producer and co-founder of RAM Records, a pioneering force in the drum and bass genre. In 2011 Andy C won the Best DJ title in the 2011 Drum and Bass Arena Awards, and since the awards' inception in 2009, he has won the people's vote in the awards for Best DJ each year. He specialises in fast mixing, often employing three turntables. A signature mixing style of Andy is what he refers to as "The Double Drop": lining up 2 tunes so that both basslines drop at the same time. Andy C has often organised events where he DJs continuously for 6 hours. In January 2011 Mixmag UK announced the result of 14 month global poll from 35 nominations chosen by other big names in dance music: the survey asked global voters to decide "Who is the Greatest DJ of All Time" Andy C was ranked number 4 on it and the highest British DJ on the list. Andy C is considered amongst the popular culture of Britain and the extended population of the world to be the "Most influential Drum & Bass DJ to ever live." Having the most successful record label in the genre, and also the greatest number of 'Best DJ' titles.
Document 4: Keiko Utoku: Keiko Utoku (宇徳敬子 , "Utoku Keiko" , born April 7, 1967 in Izumi, Kagoshima, Japan) is a Japanese singer and songwriter under UK Sweet label.Keiko made first debut with chorus part in band B.B.Queens then joined with J-pop female band Mi-Ke from 1991 to 1993, before starting a solo career. As a child, Utoku listened to a lot of music, including music made by Momoe Yamaguchi. She has written and sung many songs, such as "Wasurenagusa", and Sonic the Hedgehog fans remember her for her vocal work in the original version of the Sonic CD video game's opening and closing themes in Japan and Europe, "Sonic – You Can Do Anything" and "Cosmic Eternity – Believe In Yourself" in 1993. In addition, she also provided Sonic's vocals in the game. At recent dates, she has released 15 singles, 5 digital singles, 4 studio albums, 1 mini and 2 best albums.
Document 5: Yasutaka Nakata: Yasutaka Nakata (中田 ヤスタカ , Nakata Yasutaka , born February 6, 1980 in Kanazawa, Ishikawa) is a Japanese DJ, record producer, composer and songwriter. He formed the band Capsule in 1997 with vocalist Toshiko Koshijima and himself as composer and record producer when both were 17. They formally debuted in 2001 with the song "Sakura."
Document 6: Pendulum (drum and bass band): Pendulum is an Australian/British drum and bass and electronic rock band founded in 2002. Pendulum originally formed in the city of Perth, Western Australia by Rob Swire, Gareth McGrillen, and Paul "El Hornet" Harding. The band was later expanded to include members, Ben Mount, Peredur ap Gwynedd, and KJ Sawka. Members Swire and McGrillen also formed the electro house duo Knife Party. The group is notable for its distinctive sound, mixing hard rock with electronic music and covering a wide range of genres.
Document 7: Rob Persaud: Rob Persaud is a British music producer and songwriter who currently works and resides in Los Angeles, California. He is published by Dr. Luke's Prescription Songs. He has produced, engineered, mixed or written tracks for Jay Sean, Lady Gaga, Chris Lane, Mollie King, Jordan Fisher, Before You Exit, Sabrina Carpenter, Josh Groban, Madison Beer, Nick Jonas and others.
Document 8: Capsule (band): Capsule (カプセル , Kapuseru ) is a Japanese electronica band consisting of record producer Yasutaka Nakata and vocalist Toshiko Koshijima.
Document 9: Toshiko Koshijima: Toshiko Koshijima (こしじま としこ , Koshijima Toshiko , born March 3, 1980 in Kanazawa, Ishikawa) is a Japanese singer. Along with composer, record producer and DJ Yasutaka Nakata, she is a lead vocalist of the electronica band Capsule, which they formed in 1997 when both were 17. Their formal debut came in 2001 with the release of the single "Sakura". Two more singles and their debut album, "High Collar Girl", followed the same year.
Document 10: Kevin Parker (musician): Kevin Richard Parker (born 20 January 1986) is an Australian singer, songwriter, multi-instrumentalist and record producer, best known for being the frontman and live guitarist of the Australian psychedelic rock band Tame Impala, for which he writes, records, and produces the music. At the ARIA Music Awards of 2015 he won two awards, Engineer of the Year and Producer of the Year, for his work on Tame Impala's "Currents" (2015).
Document 11: Nick Littlemore: Nicholas George "Nick" Littlemore (born 6 May 1978) is an Australian musician and record producer. As a musician, he is the frontman of the electronic duo Pnau (with Peter Mayes), a member of the art-rock band Teenager (with Pip Brown, now known as Ladyhawke) and one part of the electro pop-duo Empire of the Sun (with Luke Steele). As a record producer, he has worked with Elton John, Robbie Williams, Lover Lover, Ellie Goulding, Lost Valentinos, Mercy Arms, Groove Armada and Mika. From late 2009, Littlemore had worked with the Cirque Du Soleil as a composer and musical director for the touring arena show, "Zarkana", which debuted on 29 June 2011. His older brother Sam La More is also a musician and record producer.
Document 12: Stereo Worxxx: Stereo Worxxx (sometimes titled as Stereo Works) is the thirteenth studio album by electronica band Capsule. It was released on March 7, 2012, by Yamaha. Produced, composed and written by Capsule member Yasutaka Nakata, "Stereo Worxxx" was the duo's last album with their label Yamaha until transferring with Warner Music Japan and Nakata's own label, Unborde. Musically, "Stereo Worxxx" focuses on electronic dance music and house music with Capsule member Toshiko Koshijima singing on all tracks apart from "Motor Force".
Document 13: Minoru Kojima: Minoru Kojima (born 11 October 1968) was the original guitarist for Japanese experimental punk band The Mad Capsule Markets. He is also known as Scene or Shin Murohime, which is apparently a conglomeration of characters from the names of different Boøwy members. He started The Mad Capsule Markets (which at the time was called Berrie) in 1985, with vocalist Hiroshi Kyono, in an attempt to create "loud, punk music" after becoming "bored" with music played on television and radio. After the release of Mad's Noël Coward "Humanity", Minoru left the band and was replaced by "support guitarist" Ai Ishigaki. In 1991 Minoru started Die in Cries and in 1994 became a member of The Bloody Imitation Society. Over the years Minoru worked with more bands and even went solo for a short time before returning to Mad to play on "Good Day" from their album "010" and playing on their "Cistm Konfliqt" tour.
Document 14: Rob Swire: Robert Swire-Thompson (born 5 November 1982) is an Australian singer, songwriter, musician, record producer and DJ, best known as the founder and vocalist of Australian/British drum and bass/electronic rock band Pendulum, as well as DJ and co-founder of electronic dance music duo Knife Party formed of Swire and Gareth McGrillen. Originally from Perth, Western Australia, he relocated to the United Kingdom in 2003 with fellow Pendulum co-founders Gareth McGrillen and Paul "El Hornet" Harding. Swire has since fulfilled a broad spectrum of roles as a member of Pendulum, ranging from song writing to singing while performing live with an unusual guitar-like MIDI controller – Starr Labs' Ztar Z6S-XPA. Swire can also play guitar, bass, keyboards and percussion. He is sometimes referred to by the stage name Anscenic.
Document 15: Toshi (musician): Toshimitsu Deyama (出山利三 , Deyama Toshimitsu , born October 10, 1965 in Tateyama, Chiba) , known exclusively by his stage name Toshi, is a Japanese singer and songwriter. He is best known as the lead vocalist and a co-founder of the heavy metal band X Japan, which disbanded in 1997. Toshi then went on to have an extensive solo career. In 2007, X Japan reunited and began an ongoing world tour in 2010. His distinctive, impassioned tenor vocals have been compared to those of Steve Perry.
ground_truth: singer