Question: Which American band formed in 1990 perform,ed at the Portland Exhibition Building?

Context paragraphs:
Greater Texas &amp; Pan-American Exposition: The Greater Texas & Pan-American Exposition was a World's Fair held at Fair Park in Dallas, Texas (USA).  The exhibition promoted the city of Dallas as the cultural and economic capital of an emerging Pan-American civilization stretching from Tierra del Fuego to Alaska.  It followed the successful Texas Centennial Exposition, which was held to celebrate the centennial anniversary of Texas in 1936.  Every exhibition building constructed for the 1936 fair (except the Hall of Negro Life, which was demolished) were simply redecorated for the event, but most major exhibitors (such as General Motors, Ford and Chrysler) did not return in 1937.  The event also included the Pan American Olympics, pitting the nations of North, Central, and South America against one another in a series of interracial contests and which led as a precursor for the eventual establishment of the Pan American Games.

Western Front (band): Western Front was an American band formed in 1985 in Portland, Oregon that consisted of Fred Cole on vocals and guitar, Kevin Conner on bass, and Jeff Evans on drums. Cole had been in the garage rock band The Lollipop Shoppe and the punk rock band The Rats, among others.  Western Front still had some punk influence but was more inspired by country music.  They released two singles on Cole's Whizeagle label, "Orygun" b/w "Clementine" and "Stampede" b/w "Looking Back At Me."  On a third single, "Coming on Strong" b/w "Rather Be Your Lover," they backed up Cole's wife Toody, who had been in The Rats.  By 1986, the band had broken up.  Fred and Toody went on to form The Range Rats, and later Dead Moon.

Rusted Root: Rusted Root is an American band formed in 1990 in Pittsburgh, Pennsylvania, by singer-guitarist Michael Glabicki, bassist Patrick Norman and percussionist Liz Berlin.  The band got its start as the house band playing a weekly gig in Jack's Back Room on Pittsburgh's South Side.  The band achieved fame in 1994 with its platinum-selling album "When I Woke", which included hit single "Send Me on My Way."  The song has been featured prominently in many films and commercials.  Rusted Root has sold more than three million albums.

Chicago (band): Chicago is an American rock band formed in 1967 in Chicago, Illinois.  The self-described "rock and roll band with horns" began as a politically charged, sometimes experimental, rock band and later moved to a predominantly softer sound, generating several hit ballads.  The group had a steady stream of hits throughout the 1970s and 1980s.  Since at least 2008, "Billboard" has shown Chicago to be the "greatest of all time" American band in singles chart success, and since 2015, the "greatest of all time" American band in album chart success as well.  Chicago is one of the longest-running and most successful rock groups, and one of the world's best-selling groups of all time, having sold more than 100 million records.

The High Strung: The High Strung is an American band from Detroit, Michigan, United States.  The band is composed of lead singer and guitarist Josh Malerman, bassist Chad Stocker, and drummer Derek Berk.  Malerman and Berk attended Michigan State University in the late 1990s before moving to New York City.  The band formed in Williamsburg, Brooklyn, when the members of the former East Lansing, Michigan, band The Masons changed their name and added Stocker to the roster.  Detroit guitarist Stephen Palmer joined the group shortly after the recording of "Dragon Dicks" in early 2010.

The Fellow Travellers: The Fellow Travellers were an American band formed in 1990 by Jeb Loy Nichols, Martin Harrison of On-U Sound Records, and Nichols' wife, vocalist Loraine Morley.  The band released three albums during their history.  The band's sound was influenced by many disparate genres, including country music, dub music, folk music, and reggae.  They have been called "the world's only country/dub band".

The Stunning: The Stunning are an Irish rock band formed in 1987.  In the seven years that they were initially together, they toured relentlessly building up a following that would make them one of the most successful Irish bands ever.  In 1990 their debut album <nowiki>"</nowiki>Paradise In The Picturehouse<nowiki>"</nowiki> spent five weeks at number one and became one of the most-loved Irish albums of all time.  Two years later, the follow-up Once Around The World also hit the number one spot, and the band went on to sell over 100,000 albums in Ireland alone.  Brewing Up A Storm has become an anthem of sorts and is to be heard everywhere from football stadiums to clubs around the country where it is still a guaranteed floor-filler.  Songs such as Half Past Two, Romeo’s on Fire, and Everything that Rises is still to be heard on the radio and have been featured in movies and numerous compilation albums of the best of Irish rock.  They toured the US and the UK with the likes of Bob Dylan and The B52s.  During their time, the band scooped every music prize and award going and their music is still to be heard on the airwaves.  The band split up in 1994 to pursue other interests and they reformed in 2003 to support the re-release of their debut album "Paradise in the Picturehouse".  They perform regularly for select Irish shows and festivals, and in 2014 they returned to New York and Boston for their first gigs there since the early nineties.  The band are currently in the studio recording new material, set for release in early 2016.

Portland Exposition Building: The Portland Exposition Building, also known as The Expo, is a sports and exhibition venue (convention center) building complex in Portland, Maine.  The complex includes five inter-connected buildings with 330,000 square feet of exhibition space and 10 meeting rooms.  The Center is adjacent to the Hadlock Field and the Portland Ice Arena.  Phish, Ani Difranco, Natalie Merchant, The Monkees, and Rusted Root have played at the venue.  It has also hosted trade shows and celebrations.  It has been used for the Maine Red Claws basketball team, Portland High School Bulldogs basketball games, and indoor track events.  In 2007, the Expo became the home of Maine Roller Derby.

No Bra (band): No Bra is an electropop band formed in east London, England, in 2003 by Susanne Oberbeck and Fanny Paul Clinton, who combine electronic pop industrial grooves with sinister Germanic folk.  The band had an underground hit with the single "Munchausen" in 2005 which was included in Radio 1 DJ's Pete Tong's "best of 2005" list and the Rough Trade best of 2005 compilation.  The track "Doherfuckher" was used as part of the sound track to Bruce La Bruce's film "Otto or up With Dead People".  In 2007, the Dutch Scapino Ballet based a ballet performance on No Bra's music which toured around Europe.  Despite claiming to be "not gay," No Bra's Susanne was nominated as their gay icon by influential British post punk band The Raincoats and asked to perform with them at the gay icons exhibition at the national portrait gallery in London in 2009.  No Bra also appears in the upcoming documentary about The Raincoats.  The musician's image has inspired several visual artists such as Christophe Chemin and Brian Kenny and photographer Wolfgang Tillmans.

The Shaky Hands: The Shaky Hands were a Portland, Oregon-based rock group, formed in 2003 by musician Paul Culp, of "Lonesome Radio Heart" and Colin Anderson.  Nicholas Delffs joined soon after on vocals and guitar.  They spent the next three years gradually building a following in the Portland area and self-releasing two CDs, one informally called "The Skidmore Days", which is a lo-fi full-length album recorded in future guitarist Jeff Lehman's North Portland basement and mixed by Alex Arrowsmith.  They also released a self-titled EP informally referred to as the "Bonnie Doon EP", in reference to the location it was recorded.  The Shaky Hands were signed to Holocene Music in late 2006.  By this time, the lineup had changed considerably, with Mayhaw Hoons replacing Culp (who left in late 2004) on bass and the addition of second guitarist Jeff Lehman.  Nathan Delffs (Nicholas' brother, and member of The Castanets) joined shortly thereafter on percussion and lap steel.  Their sound is a fusion of 1960s style British Invasion bands such as The Kinks, The Who and The Zombies and American folk-rock in the vein of Neil Young.  The result is what many have described as a loose, jangly, rootsy style of indie rock.  The Delffs brothers (along with most of the members of Shaky Hands) also perform Shaky Hands songs (alongside original compositions) under the Death Songs moniker, a more experimental and folk-oriented side project.

Supporting paragraphs: Portland Exposition Building Rusted Root
Answer: Rusted Root