Question: Are both Billy Milano and Luca Prodan considered American singers?

Context paragraphs:
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.

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".

Zoetrope (band): Zoetrope was an American heavy metal band from Chicago, Illinois.  Although their sound was akin to thrash metal, the group described themselves as "Street Metal".  The group was formed in 1976 by teenage friends Barry Stern (drums/vocals), Kevin Michael Rasofsky, aka Kevin Michael, (guitar), and Calvin "Willis" Humphrey (bass), soon to be joined by second guitarist Ken Black.  Initially playing covers, the band soon ventured into writing their own material and released a single in 1980.  Although undeniably a metal band, Zoetrope was also active in Chicago's hardcore punk scene, sharing bills with locals hardcore bands and hanging out at O'Banions, a Chicago punk bar (Ken Black and Barry Stern also produced the self-titled LP by Chicago-based hardcore band Life Sentence in 1986).  Following the release of a couple of demo tapes, the group was signed to Combat Records and issued their first LP, "Amnesty", in 1985.  In 1987, the band traveled to Los Angeles to record their follow up, "A Life of Crime", with producer Randy Burns (Megadeth, Nuclear Assault).  During the recording sessions, Ken Black left the band and returned to Chicago to sort out substance abuse issues.  He was replaced by Louis Svitek.  Although Svitek appears on the album's cover, Kevin Michael later confirmed that Ken Black had finished his guitar parts before leaving Los Angeles.  During the tour supporting "A Life of Crime", Svitek was recruited for M.O.D. by Billy Milano.  After the tour, Barry Stern jumped ship to fellow Chicagoans Trouble.  Kevin Michael eventually returned with a new line up for 1993's "Mind Over Splatter" but the band folded for good soon after.

Billy Milano: Billy Milano is a Bronx-born heavy metal musician now based in Austin, Texas.  He is the singer and - occasionally - guitarist and bassist of crossover thrash band M.O.D., and he was also the singer of its predecessor, Stormtroopers of Death.  He was also the singer of United Forces, which also featured his Stormtroopers of Death bandmate Dan Lilker.

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.

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".

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.

Thrash of the Titans: Thrash of the Titans was a benefit concert held on August 11, 2001 at the Maritime Hall in San Francisco, CA.  The concert was a co-benefit for Testament vocalist Chuck Billy, who was diagnosed with germ cell seminoma (a rare form of cancer); and Chuck Schuldiner, leader of the death metal band Death, who was also battling cancer.  The Master of Ceremonies for the evening was S.O.D. vocalist Billy Milano.  The concert was organized by Walter Morgan.  The show was announced in May 2001, and all 2300 tickets quickly sold out.

20 Years of Dysfunction: 20 Years Of Dysfunction is a DVD/CD released in 2005 by crossover thrash band Stormtroopers Of Death.  Mainly created by singer Billy Milano, the material for the 2-disc DVD/CD is mostly culled from fan-shot amateur footage.  The relative scarceness of available material has resulted in some hilarious decisions by the production team; for instance, "Milk" is sung by Danny Lilker but the video footage inappropriately shows vocalist Milano singing.  Also notable is that the DVD does not include any material from the second Stormtroopers Of Death studio album "Bigger Than The Devil".

M.O.D.: M.O.D. (abbreviation for Method of Destruction) is a crossover thrash band from New York City, fronted by Stormtroopers of Death vocalist Billy Milano.  The band has been around for 31 years (minus one hiatus from 1997 to 2001), and released eight studio albums.  With M.O.D., Milano sought to continue on the musical path of the bands Anthrax, Stormtroopers of Death and Nuclear Assault, mixing shades of hardcore punk with thrash metal and often humorous and politically incorrect lyrics.

Supporting paragraphs: Billy Milano Luca Prodan
Answer: no