Question: Then & Now is an album by a band formed in which year ?
Context: The discography of Irish rock band U2 consists of thirteen studio albums, one live album, three compilation albums, sixty-seven singles, and eight extended plays (EPs).  The band formed at Mount Temple Comprehensive School in 1976 as teenagers.  In 1979, the group issued their first release, the EP "U2-3", which sold well in Ireland.  The following year, the group signed to Island Records and released their debut album, "Boy".  It reached number 52 in the UK and number 63 in the US.  They followed it up with the release of "October" (1981) and "War" (1983).  "War" was a commercial success, becoming the band's first number-one album in the UK while reaching number 12 in the US.  The album yielded the singles "Sunday Bloody Sunday" and "New Year's Day" and have since become among the band's most popular songs.  On the subsequent War Tour, the group recorded the live album "Under a Blood Red Sky" and concert film "", both of which sold well and helped establish them globally as a live act. Asia are an English progressive rock band formed in London in 1981.  The most commercially successful line-up was its original, which was a supergroup of four members of different progressive rock bands of the 1970s, including lead vocalist and bassist John Wetton of King Crimson, guitarist Steve Howe of Yes, keyboardist Geoff Downes of Yes and The Buggles, and drummer Carl Palmer of Emerson, Lake & Palmer.  Their debut album, "Asia", released in 1982, remains their best selling album and went to number one in several countries. AC/DC are a hard rock band formed in Sydney, Australia in 1973 by brothers Angus and Malcolm Young.  Although the band are considered pioneers of heavy metal, its members have always classified their music as "rock 'n' roll".  AC/DC underwent several line-up changes before releasing their first album, "High Voltage", in 1975.  Membership remained stable until bassist Cliff Williams replaced Mark Evans in 1977.  In 1979, the band recorded their highly successful album "Highway to Hell".  Lead singer and co-songwriter Bon Scott died on 19 February 1980, after a night of heavy alcohol consumption.  The group briefly considered disbanding, but soon ex-Geordie singer Brian Johnson was selected as Scott's replacement.  Later that year, the band released their best-selling album, "Back in Black".  The band's next album, "For Those About to Rock We Salute You", was also highly successful and was their first album to reach number one in the United States.  AC/DC declined in popularity soon after the departure of drummer Phil Rudd in 1983.  Poor record sales continued until the release of "The Razors Edge" in 1990.  Phil Rudd returned in 1994 and contributed to the band's 1995 album "Ballbreaker". " Stiff Upper Lip" was released in 2000 and was well received by critics.  The band's new album "Black Ice" was announced in June 2008 and was released on October 20, 2008.  The album's first single, "Rock 'N Roll Train", earned AC/DC a Grammy nomination for Best Rock Group or Duo with Vocals.  Another "Black Ice" track, "War Machine," gained AC/DC their first Grammy Award win, for Best Hard Rock Performance. Then & Now is British rock band Asia's half fourth studio/half first greatest hits album.  The six tracks 1–5 and 10 are from earlier albums ("Then"), while the four tracks 6–9 inclusive are new recordings ("Now").  It was released on 14 August 1990 in the United States by Geffen Records. The Agents were a post-punk band formed in 1980 in Bristol, England.  The band formed from the remnants of several bands that were playing the American Military bases circuit in Europe in the 1970s.  The band were based in Mannheim, Germany and the lineup consisted of vocalist Swig (real name Richard Snow), guitarist Dave Libby, bassist Larry Burr and drummer Nick Bahra.  The band were known for an exciting live act and built up a big following in Europe.  In 1981 they released "Everybody's Gonna Be Happy", a single printed in green vinyl with a gatefold sleeve.  The album (of the same name), release the same year on Teldec, produced by Ingo Schantz. The discography of Scottish rock band The Twilight Sad consists of four studio albums, four compilation albums, eleven singles, and five extended plays (EPs).  The band currently consists of James Graham (vocals), Andy MacFarlane (guitar, producer), and Mark Devine (drums).  The Kilsyth-based band formed in 2003 and were signed to Fat Cat Records when Alex Knight, co-founder of the label, went to Glasgow to watch the band perform their third gig and signed them on the spot.  The band released their debut EP "The Twilight Sad" in November 2006 in the United States only, followed by their debut album "Fourteen Autumns & Fifteen Winters" in April 2007, which garnered widespread critical acclaim.  The album spawned two singles, "That Summer, at Home I Had Become the Invisible Boy" in April, and "And She Would Darken the Memory" in July.  The following year, the band released "Here, It Never Snowed.  Afterwards It Did", a mini-album of reworked versions of songs from "Fourteen Autumns & Fifteen Winters" and two non-album tracks, inspired by stripped-down live performances.  A collection of live versions and previously unreleased tracks entitled "Killed My Parents and Hit the Road" was released in December 2008.  The Twilight Sad's second studio album, "Forget the Night Ahead", was released in September 2009 to further acclaim and marked a shift in the band's direction towards a darker and more streamlined sound.  The album produced three singles: "I Became a Prostitute" in August 2009, "Seven Years of Letters" in October 2009, and "The Room" in April 2010.  Founding bassist Craig Orzel left the band in February 2010, and the band released "The Wrong Car" EP in September of that year. Graf Orlock is an American grindcore band formed in 2003 in Los Angeles, California.  They are named after Count Orlok from the 1922 film "Nosferatu".  The band consists of members of the hardcore punk bands Greyskull, Arctic Choke, Dangers and Ghostlimb, and employs audio snippets and script dialogue from action films such as "The Terminator", "Aliens" and "RoboCop" in all their songs, which has led to the band being jokingly described as "cinema-grind."  The band formed after guitarist "Jason Schmidt" and drummer "Alan Hunter" along with bassist "Sven Calhoun" and vocalist "Kalvin Kristoff" begun releasing EPs and split albums.  In 2006, they started the "Destination Time" trilogy based on a screenplay that "Schmidt" and "Hunter" had been working on in university; the second instalment was the 2007 EP "Destination Time Tomorrow" which was listed at number 16 in "Decibel Magazine"'s top 40 releases of 2007.  Their latest album "Crimetraveler" was released in 2016 through Vitriol Records, a label run by members of the band and also featuring Ghostlimb, Robotosaurus, Owen Hart, Teeth, Dangers, Birds in Row and Totalt Jävla Mörker. Kawaihae is an island music band formed in the summer 2000 in Japan formed by Tokyo/Yokohama/Nagoya radio personality Vance K who was born and raised on the Big Island of Hawaii.  Since the band formed, they have released three albums and is currently working on a 4th album slated for release in 2009.  The band houses a large fanbase within Japan and Hawaii and has received the Group of the Year award at the 2004 Hawaii Music Awards. Acrassicauda is an American-based Iraqi heavy metal band formed in 2001.  It is often credited as being the first heavy metal group to emerge from Iraq.  The original band consisted of three Arab members and one Assyrian (Tony Aziz Yaqoo).  The band formed and played concerts under the regime of Saddam Hussein.  It became well known outside of the local Iraqi metal scene after Vice magazine did a profile of the band.  It received even greater coverage when it was profiled in a feature-length documentary about the band and its troubles in Iraq called "Heavy Metal in Baghdad".  The band's first album was released on March 9, 2010. Kilburn and the High Roads were a British pub rock band formed by Ian Dury in 1970, and the first band formed by Dury.  The band released one studio album in 1975 before disbanding the same year.  Allmusic credits the band with being "an undeniable influence on punk and new wave".
Answer: 1981