Question: Who is affiliated with more bands, Ronnie James Dio or Luca Prodan?

full_context: Document 1: Luca Prodan: Luca Prodan (17 May 1953 – 22 December 1987) was an Italian–Scotish musician and singer. He was the leader and singer of Sumo, one of the most influential rock bands of Argentina, and is widely considered as one of the most important artists of the last quarter of the twentieth century in his country.
Document 2: Ronnie James Dio: Ronald James Padavona (July 10, 1942May 16, 2010), better known by his stage name Ronnie James Dio, was an American singer, songwriter, and musician. He fronted and/or founded numerous groups including Elf, Rainbow, Black Sabbath, Dio, and Heaven & Hell. He is credited with popularizing the "metal horns" hand gesture in metal culture and was known for his medieval-themed lyrics. Dio possessed a powerful versatile vocal range capable of singing both hard rock and lighter ballads.
Document 3: Lucio Battisti: Lucio Battisti (5 March 1943 – 9 September 1998) was an Italian singer and composer. He is considered to be one of the best-known and most influential musicians and authors in Italian pop/rock music history.
Document 4: Metal Hits (Dio album): Metal Hits is a compilation album by the heavy metal band Dio and was released in 2005 by Rhino Flashback Records. Multi-instrumentalist and heavy-metal mainstay Ronnie James Dio built up a hefty back catalog over the decades, with a career that spans vocalizing for Rainbow, Black Sabbath, and of course, his own group, Dio. This best-of, which covers the Dio years exclusively, spans the period 1983's Holy Diver and 1990's Lock Up the Wolves, and is packed with the kind of high-octane performances Dio fans have come to treasure. Neo-Gothic masterpieces like "Sunset Superman" and "Dream Evil" share space with the metal mysticism of "Last in Line," while Dio's hell's-gate scream holds sway over all.
Document 5: Holy Dio: Tribute to Ronnie James Dio: Holy Dio: A Tribute to Ronnie James Dio is a compilation album, released on January 25, 2000. It is a tribute album to Ronnie James Dio, featuring covers of several songs he had sung during his time with Rainbow, Black Sabbath and his own band Dio. The covers done on this tribute album were recorded by mostly power metal bands.
Document 6: Andrea Prodan: Andrea Prodan (born 16 November 1961) Scottish-Italian film actor, composer and musician is the younger brother of Argentine rock star Luca Prodan. The Prodan family, after suffering internment in a Japanese concentration camp during WW II, was expelled from China due to Mao. Andrea's Italian father was an author and talented sportsman, and had run a prosperous business, with expertise in ancient Chinese pottery. His mother is Scottish.
Document 7: Luca Turilli: Luca Turilli (born 5 March 1972) is an Italian musician (primarily a guitarist) and songwriter. He is one of the founders of the symphonic power metal band Rhapsody of Fire. He also worked on a trilogy of solo albums as Luca Turilli, and released one album under the name of Luca Turilli's Dreamquest, a project he worked on alongside Dominique Leurquin. In 2008, Luca began an online guitar course titled "Luca Turilli's Neoclassical Revelation". The course takes its name from his neoclassical playing style.
Document 8: Ronnie James Dio – This Is Your Life: Ronnie James Dio – This Is Your Life is a 2014 tribute album to singer-songwriter Ronnie James Dio, lead singer of several heavy metal bands including Elf, Rainbow, Black Sabbath, Heaven & Hell, and his own band Dio. The album features many of Dio's contemporaries performing songs originally recorded by Dio. Tenacious D won the Grammy Award for Best Metal Performance at the 57th Grammy Awards for their cover of "The Last in Line", and Anthrax were nominated in the same category for their cover of "Neon Knights".
Document 9: Scottish music (1980–1989): During the 1980s, Scottish music featured post-punk bands exemplified by Simple Minds and Josef K, and bands like Runrig that remained closer to the Scottish dance music tradition. Folk rock or Celtic rock bands launched in the 1980s included The Waterboys and The Proclaimers. Among the folk singers of the time were Dick Gaughan and Bill Drummond, and Ewan MacColl who died in 1989.
Document 10: Elf (album): Elf is the first album by Ronnie James Dio's blues rock band called Elf. Produced by Ian Paice and Roger Glover of Deep Purple, the record was released in 1972. In this album, Dio is listed by his birth name Ronald Padavona. Though Dio had used "Padavona" for songwriting credits on earlier singles, Dio explained in an interview in 1994 that he used his birth name on this album as a tribute to his parents so that they could see their family name on an album at least once.
Document 11: Las Pelotas: Las Pelotas (in English: "The Balls"); is an Argentine band rock and reggae, from Córdoba. This band was formed after the separation of Sumo, due to the death of their singer, Luca Prodan in 1987. The group currently consists of vocalist and guitarist, Germán Daffunchio, Gabriela Martínez on bass, Tomás Sussman on guitar, Sebastián Schachtel on Keyboards and Gustavo Jove on drums. Their original vocalist, Alejandro Sokol, was part of the band from 1988 to 2008; year that begins his solo career, cut short by his sudden death in 2009.
Document 12: Divididos: Divididos ("Divided") is an Argentine rock band. The band was formed in 1988 after the death of Luca Prodan and the consequent dissolution of the band Sumo. Ricardo Mollo (vocals, guitar) and Diego Arnedo (bass guitar) joined drummer Gustavo Collado to form a band named "La División" (The Division), which would be later called "Divididos".
Document 13: Dio discography: The following is a comprehensive discography of Dio, an American heavy metal band led by vocalist Ronnie James Dio. Dio was formed in 1982 after Ronnie James Dio and drummer Vinny Appice left Black Sabbath. The band went through frequent personnel changes. The final line-up consisted of Dio (vocals), Craig Goldy (guitars), Rudy Sarzo (bass), Simon Wright (drums) and Scott Warren (keyboards).
Document 14: Sumo (band): Sumo was a 1980s Argentine alternative rock band, merging "post-punk" with "reggae". Headed by Italian-born Luca Prodan, it remained underground for most of its short activity, but was extremely influential in shaping contemporary Argentine rock. Sumo introduced British post-punk to the Argentine scene, with many lyrics in English. And provided a visceral counterpoint to the progressive and nueva canción influences then dominant in "Rock en Español".
Document 15: Song for Ronnie James: "Song for Ronnie James" is a song by Norwegian heavy metal singer Jorn from the tribute album "Dio". It was written as a tribute to the deceased Ronnie James Dio who died a couple of months earlier. The song is the only on the album which isn't a Dio / Black Sabbath / Rainbow cover. It has been performed live many times but the most notable was at "Brew House" Gothenburg, Sweden when the crowd sang almost the whole song. Clocking at 8:07 it is the longest track on the album.
ground_truth: Ronnie James Dio