Question: Who was in two bands,  Saúl Hernández or Debbie Harry?
Context: Deborah Ann Harry (born Angela Tremble; July 1, 1945) is an American singer-songwriter and actress best known as the lead singer of the new wave band Blondie.  Her recordings with the band reached the number one position in the United States and the United Kingdom on multiple occasions from 1978 to 1981.  She is considered the first female rapper to chart at number one in the U.S. owing to her work on "Rapture". Once More into the Bleach is a remix album released in December 1988 by the band Blondie and Debbie Harry.  The 13-track compilation contains remixes of Blondie songs and material from Debbie Harry's solo career. In the Fishtank is an ongoing project of Konkurrent, an independent music distributor in the Netherlands.  In this project, Konkurrent invites one or two bands to record and gives them two days studio time.  The first four albums were recorded by individual bands, but eight of the last ten releases were the result of two bands (three in one case) teaming up to record.  The Ex is so far the only band to appear on more than one album in the series. Jaguares is a Mexican alternative rock band formed by former Caifanes lead singer Saúl Hernández, ex-Caifan Alfonso André (drums), and two long-time friends Federico Fong (bass guitar) and José Manuel Aguilera (lead guitar). El diablito (The Little Devil, which was originally to be called Volumen 2) is the second studio album by Mexican rock band Caifanes, released on June 26, 1990.  Original members Saúl Hernández, Alfonso André, Sabo Romo, and Diego Herrera returned, along with a new guitar player, Alejandro Marcovich, who joined in September 1989. Saúl Alfonso Hernández Estrada (born January 15, 1964), is the lead singer, main songwriter and guitarist of Jaguares (band) and formerly of Caifanes, two of the most famous Mexican rock en español groups, the oldest (Caifanes) was formed in 1986. La Barranca has been a successful ongoing outfit for over a decade.  Based in Mexico City, they are led by guitarist and songwriter José Manuel Aguilera, who previously and concurrently worked with Sangre Azteka, Jaguares, Cecilia Toussaint, Steven Brown/Nine Rain (Tuxedomoon), and more.  He has an unusually economical style of playing that concentrates on great rhythms, superb tone, and very melodic solos.  After the original lineup—Aguilera, Federico Fong (bass), Alfonso Andre (drums), all of whom were guest members of Jaguares with former Caifanes frontman Saúl Hernández—went its separate ways, a second version of the band included Santa Sabina guitar virtuoso Alex Otaola and the extremely flexible rhythm section of brothers Jose María ("Chema") and Alonso Arreola.  The band's sound effortlessly moves from flat out rock to fusion-ish jamming and passes through a kind of Mexican folk influence along the way.  Aguilera is a good singer with a talent for finding simple melodies amidst rather complex songs.  On "El Fluir" the band decided to record live and to cut back on the keyboard and programmed additions to their music.  Surprisingly, the result was not an over-the-top jamfest but rather a very tightly arranged set of songs that hinted at the overwhelming power they could possess in concert.  The two guitar interplay between Aguilera and Otaola was highly impressive as they explored all forms of playing together and against one another (with Otaola pulling all sorts of radical sounds out of his guitar).  "El Fluir" was their first US release since "Tempestad" in 1998.  This edition was further sweetened by the inclusion of a previously unreleased bonus track and a video for the first single "Pare de Sufrir." Sahra is a studio album from Algerian raï artist Khaled, released in 1996.  It was the artist's biggest production to date, being co-produced by Philippe Eidel, Don Was, Jean-Jacques Goldman and Clive Hunt, and including performances by many other singers from around the world.  It features what is perhaps Khaled's most popular song, "Aïcha".  Most tracks are sung in Arabic, with a notable dosage of French.  "Ki Kounti" is partially sung in Spanish as it features Mexican Rock vocalist Saúl Hernández from the reputable band Caifanes.  The title track is named after Khaled's first daughter, Sarah, to whom the album is dedicated along with her mother, Samira. Caifanes is a Spanish-language rock en español band from Mexico City.  Formed in 1987, the group achieved international fame during the late 1980s and early 1990s.  The original lineup consisted of Saúl Hernández (vocals & guitar), (lead guitar) Sabo Romo (bass guitar), (drums), and (keyboards and saxophone).  Caifanes’ style can be described as a hybrid of British new wave, progressive rock and Latin percussion underscored by deep, somber, and Latin American-Mexican-Spanish-influenced lyrics and the vocal style of Saúl Hernández.  Members of Caifanes have cited King Crimson and Teresa Escogido as a major influence. "Union City Blue" is a song by the US rock band Blondie.  It was written by Debbie Harry and Nigel Harrison, and was featured on their fourth studio album "Eat to the Beat" from 1979.  The tune was inspired by the 1979 movie "Union City", which Debbie Harry appeared in (she wrote the lyrics one evening during a break in the shooting).
Answer: Saúl Alfonso Hernández