Question: When was the rock band which Joe Puerta is the bassist for founded?

Context paragraphs:
Ambrosia (band): Ambrosia is an American rock band formed in southern California in 1970.  Ambrosia had five Top 40 hit singles on Warner Bros.  Records released between 1975 and 1980, including the Top 5 hits "How Much I Feel" and "Biggest Part of Me".  Most of the original band members have been active with the group continuously for the past 25 years to the present day.

Gabe Nelson: Gabriel "Gabe" Nelson is an American rock musician from Sacramento, California, best known as the bassist for the alternative rock band Cake, and songwriter/vocalist of the band Bellygunner.  With Cake, Nelson replaced the original bassist, Shon Meckfessel, who left Cake to attend college, soon after the band was formed.  However, Nelson left the band himself before the release of their first album, "Motorcade of Generosity", which lists Victor Damiani as bassist.  Damiani stayed with Cake until after the release of their second album, "Fashion Nugget".  After this, Damiani left the band and Nelson re-joined.  He has been their bassist since then, playing on their four subsequent studio albums.

Joe Russo's Almost Dead: Joe Russo's Almost Dead is an American rock band formed in 2013 who plays mostly the music of the Grateful Dead as well as other covers.  Formed by Furthur drummer Joe Russo, the band played their first show on January 26, 2013.  In addition to drummer Joe Russo, the band also includes Ween's bassist Dave Dreiwitz, keyboardist Marco Benevento, Scott Metzger on guitar and vocals, and American Babies' Tom Hamilton on guitar and vocals.

Joe Puerta: Joe Puerta (born 2 July 1951, California, US) is the bassist/vocalist and co-founder (along with David Pack) of the American rock group Ambrosia.  He is credited with co-writing one of their earlier hits, "Holdin' On To Yesterday" (1975).  He was a member of Sheena Easton's band from 1983 to 1985 and later formed Bruce Hornsby and the Range with Hornsby, who was also in Easton's band.

Joe Raposo (bassist): Joe Raposo (born 1970), of Portuguese descent, is the bassist for the seminal California punk rock band Lagwagon and qa engineer lead at Zynga.  He also played bass for a period of time for The Real Mckenzies and Mad Caddies.  Additionally, Raposo plays bass for the San Francisco-based fusion group King City, with fellow Lagwagon member Chris Rest as well as filling in on bass for several live shows with the Dwarves.  Raposo began his career in 1987 at the age of seventeen by joining California hardcore punk band Rich Kids on LSD as their new bassist and remained with RKL until their hiatus in 1996.  He began playing shows with RKL again in 2003 (after they had re-formed a year prior) until their current hiatus after the death of lead singer Jason Sears.  Raposo joined Lagwagon in 2010, replacing original bassist Jesse Buglione.  Raposo also plays bass in the cover band Uke-Hunt.

Joe Lynn Turner: Joe Lynn Turner (born Joseph Arthur Mark Linquito, August 2, 1951) is an American singer, guitarist, songwriter, and producer.  He is known for his work in the hard rock bands Rainbow and Deep Purple.  During his career, Turner fronted and played guitar with pop rock band Fandango in the late 1970s; and in the early 80s, he became a member of Rainbow, fronting the band and writing songs with guitarist, Ritchie Blackmore and bassist, and producer, Roger Glover.  After Rainbow had disbanded (the first time) in March 1984, he pursued a solo career, released one album, Rescue You, and then later did session work, singing background vocals for the likes of Billy Joel, Cher, and Michael Bolton.  On the advice of Bolton, Turner began recording jingles for radio and television.  Other songs he had composed or through collaboration with songwriters like Desmond Child and Jack Ponti were being recorded and released by international recording artists Jimmy Barnes, Lee Aaron, and Bonfire.  Turner had a short-lived association with neoclassical metal guitarist Yngwie Malmsteen and then Deep Purple.  From the mid-1990s, he resumed his solo career, releasing an additional nine studio and two live recordings.  Turner did other session work, appearing as lead vocalist on tribute albums and working on projects involving various musical groups including progressive rock band Mother's Army; Bulgarian hard rock band Brazen Abbot; funk rock duo Hughes Turner Project; and classic rock/ progressive rock band Rated X.  In 2006, Frontiers Records approached Turner to become involved with the AOR side project Sunstorm.  By 2016, four albums under the Sunstorm name had been released.  That same year, Turner released "The Sessions" via Cleopatra Records featuring a veritable who's who of classic rock royalty as guest musicians, before resuming his seemingly constant touring schedule back in Europe

Tremonti (band): Tremonti is an American heavy metal band founded and fronted by lead vocalist and guitarist Mark Tremonti, best known as the guitarist of the American rock band Creed, and the lead guitarist of American rock band Alter Bridge.  The band also consists of rhythm guitarist Eric Friedman and drummer Garrett Whitlock.  Bassist Wolfgang Van Halen was in the band between 2012 to 2017.  What originally started as a Mark Tremonti solo project evolved into a fully fledged band after the release of the group's first album, "All I Was", in July 2012.  That album featured Tremonti himself playing guitar in addition to lead vocals, and the band was joined by Tremonti's Creed and Alter Bridge bandmate Brian Marshall playing bass on tour until his departure later that year.  He was replaced by Van Halen bassist Wolfgang Van Halen, who contributed to the band's second album, "Cauterize", which was released on June 9, 2015.  The band also has another album, entitled "Dust", in April 2016, serving as a continuation to "Cauterize".

A Puerta Cerrada (album): A Puerta Cerrada is the first studio album by Spanish rock band Fito & Fitipaldis.  It was produced by Iñaki "Uoho" Antón and Fito Cabrales, recorded and published by DRO in 1998.

Black Suit Youth: Black Suit Youth is an alternative rock band from East Meadow, New York.  Formed in 2004 under the original name The New York Dynamite with original line-up of Bryan Maher (Guitar, Vocals), Joe Hess (Guitars), Mike Madigan (Bass) and Justin Damers (Drums), the band recorded their debut EP with burgeoning producer Tomas Costanza (Diffuser, Band Camp, Disney artists).  In 2007 the band changed their name to Black Suit Youth and released their debut album, "Our Future Is History" which followed relentless touring throughout 2007 and 2008.  In 2008 the band brought in bassist D.J. Meisse to replace bassist Daniela Viteritti and released their second album on All Hail Records.  The critically acclaimed Meet Me In Death Valley was released on October 10, 2010.  2010 saw the band touring and supporting Story Of The Year, Armor For Sleep and Alien Ant Farm.  2012 brought another line-up change with Danny Kopij and Bryan Contreras replacing D.J. Meisse and Justin Damers on bass and drums, respectively.  In early 2013 bassist Danny Kopij resigned, replaced by Eddie Christian on January 27, 2013.  The band is currently working on a follow-up to 2010's "Meet Me In Death Valley," due for release in 2013.

La Llave de la Puerta Secreta: La Llave de la Puerta Secreta ("The Key of the Secret Door" in English) is the eight studio album by Argentine hard rock band Rata Blanca released by PopArt Music in 2005.  Produced by Walter Giardino, the album was a commercial success, particularly in Argentina, where it sold well enough to be certified Platinum by the CAPIF that same year.  The album includes the hit single "Aún Estás en Mis Sueños", which became the band's new classic and a perennial radio favorite.

Supporting paragraphs: Joe Puerta Ambrosia (band)
Answer: 1970