Question: What is the economy of the city where the performer of Birdbrain was formed?

full_context: Document 1: Tom Keifer: Carl Thomas Keifer (born January 26, 1961, in Springfield, Pennsylvania) is an American vocalist and guitarist for the band Cinderella.
Document 2: Tom Petty and the Heartbreakers: Tom Petty and the Heartbreakers (alternately Tom Petty & The Heartbreakers) were an American rock band from Gainesville, Florida. Formed in 1976, the band originally comprised Tom Petty (lead singer, guitar), Mike Campbell (lead guitarist), Ron Blair (bass guitar), Stan Lynch (drums), and Benmont Tench (keyboards). In 1981, Blair, weary of the touring lifestyle, departed the band. His replacement, Howie Epstein, stayed with the band for the next two decades. In 1991, Scott Thurston joined the band as a multi-instrumentalist—mostly on rhythm guitar and second keyboards. Blair returned to the Heartbreakers in 2002, the year before Epstein's death. In 1994, Steve Ferrone replaced Lynch on drums. The band is best known for the hit singles "American Girl", "Breakdown", "The Waiting", "Learning to Fly", "Refugee" and "Mary Jane's Last Dance".
Document 3: New York City: New York is a global hub of international business and commerce. In 2012, New York City topped the first Global Economic Power Index, published by The Atlantic (to be differentiated from a namesake list published by the Martin Prosperity Institute), with cities ranked according to criteria reflecting their presence on similar lists as published by other entities. The city is a major center for banking and finance, retailing, world trade, transportation, tourism, real estate, new media as well as traditional media, advertising, legal services, accountancy, insurance, theater, fashion, and the arts in the United States; while Silicon Alley, metonymous for New York's broad-spectrum high technology sphere, continues to expand. The Port of New York and New Jersey is also a major economic engine, handling record cargo volume in the first half of 2014.
Document 4: Several Shades of Why: Several Shades of Why is the debut solo studio album by Dinosaur Jr frontman J Mascis, released March 15, 2011 on Sub Pop Records.
Document 5: New Delhi: The 2011 World Wealth Report ranks economic activity in New Delhi at 39, but overall the capital is ranked at 37, above cities like Jakarta and Johannesburg. New Delhi with Beijing shares the top position as the most targeted emerging markets retail destination among Asia-Pacific markets.
Document 6: Boston: A global city, Boston is placed among the top 30 most economically powerful cities in the world. Encompassing $363 billion, the Greater Boston metropolitan area has the sixth-largest economy in the country and 12th-largest in the world.
Document 7: Birdbrain (album): Birdbrain is the second album by American alternative rock band Buffalo Tom, released in 1990. Dinosaur Jr mastermind J Mascis once again assisted with production, alongside Sean Slade. Buffalo Tom singer/guitarist Bill Janovitz said that Mascis' influence probably accented the band's edgier side.
Document 8: Buffalo Tom: Buffalo Tom is an American alternative rock band from Boston, Massachusetts, formed in 1986. Its principal members are guitarist Bill Janovitz, bassist Chris Colbourn, and drummer Tom Maginnis. The band's name is derived from the band Buffalo Springfield and the first name of the drummer.
Document 9: Boston: Boston is an intellectual, technological, and political center but has lost some important regional institutions, including the acquisition of The Boston Globe by The New York Times, and the loss to mergers and acquisitions of local financial institutions such as FleetBoston Financial, which was acquired by Charlotte-based Bank of America in 2004. Boston-based department stores Jordan Marsh and Filene's have both been merged into the Cincinnati–based Macy's. Boston has experienced gentrification in the latter half of the 20th century, with housing prices increasing sharply since the 1990s. Living expenses have risen, and Boston has one of the highest costs of living in the United States, and was ranked the 129th most expensive major city in the world in a 2011 survey of 214 cities. Despite cost of living issues, Boston ranks high on livability ratings, ranking 36th worldwide in quality of living in 2011 in a survey of 221 major cities.
Document 10: Alex Bevan: The release of the album Springboard got him some public recognition due to the local hit song Skinny Little Boy. In 1977 he performed on the air on Cleveland's WMMS Radio with a band called Alex Bevan and the Buzzard Band, featuring DJ Matt the Cat on guitar. He performed in the mid-1970s with an acoustic trio consisting of two guitars and electric bass, and opened for such acts as Seals and Crofts, The Michael Stanley Band, The Doobie Brothers and Hall & Oates. He soon added David Krauss from the band Tiny Alice to the group, supplying percussion and harmonica. They toured either under the name Grand River Band or Alex Bevan and Friends from 1979 until 1981, and produced the albums The Grand River Lullaby, Alex Bevan and Friends Live, and Simple Things Done Well. In the early 80's Bevan produced the direct - to - disk digital solo album Tales of the Low Tech Troubadour Vol. 1. He played in the band Alex Bevan & Cuttlefish from 1984 through 1986. In the late 80s to early 90s, he produced the albums Best Kept Secrets, Cuttlefish Live, and Watersongs.
Document 11: Boston: Tourism also composes a large part of Boston's economy, with 21.2 million domestic and international visitors spending $8.3 billion in 2011; excluding visitors from Canada and Mexico, over 1.4 million international tourists visited Boston in 2014, with those from China and the United Kingdom leading the list. Boston's status as a state capital as well as the regional home of federal agencies has rendered law and government to be another major component of the city's economy. The city is a major seaport along the United States' East Coast and the oldest continuously operated industrial and fishing port in the Western Hemisphere.
Document 12: Surfin' Bird: The Rivingtons followed up their 1962 Billboard Hot 100 hit ``Papa - Oom - Mow - Mow ''with the similar`` The Bird's the Word'' in 1963. The Trashmen had not heard this version but saw a band called The Sorensen Brothers playing it. They decided to play the song that night at their own gig. During this first performance, drummer and vocalist Steve Wahrer stopped playing and ad - libbed the ``Surfin 'Bird ''middle section. Despite not knowing`` The Bird's the Word'' was a Rivingtons song, the similarity to ``Papa - Oom - Mow - Mow ''was obvious and The Trashmen added the chorus to the end of their new track.
Document 13: Dream Theater: Dream Theater was formed in Massachusetts in 1985 when guitarist John Petrucci, bassist John Myung, and drummer Mike Portnoy decided to form a band while attending the Berklee College of Music. The trio started by covering Rush and Iron Maiden songs in the rehearsal rooms at Berklee.
Document 14: Tom Petty and the Heartbreakers: In 1976, Petty, with himself as lead singer and guitarist, formed ``Tom Petty and the Heartbreakers ''with Mike Campbell (lead guitarist), Ron Blair (bass), Stan Lynch (drums), and Benmont Tench (keyboards). The Heartbreakers began their recording career with a self - titled album, released through the Shelter label. Initially, the Heartbreakers did not gain much traction in the US, although they achieved success in the UK playing`` Anything That's Rock 'n' Roll'' on Top of the Pops. Early singles included ``Breakdown ''and`` American Girl''. Recalling the band's first gig in the UK in 1976, Petty states, ``The audience just jumped up and charged the stage and were boogieing their brains out. It was such a rush. Wow, we had never seen anything like that, man. ''`` Breakdown'' was re-released in the U.S. and became a Top 40 hit in 1978, after word filtered back of the band's massive success in the UK. ``American Girl ''was covered in 1977 by Roger McGuinn on his`` Thunderbyrd'' LP.
Document 15: Sibylle Baier: The songs that made up her album "Colour Green" were home reel-to-reel tape recordings Baier had made in Germany between 1970 and 1973. Some 30 years later, her son Robby compiled a CD from these recordings to give to family members as presents. He also gave a copy to Dinosaur Jr's J Mascis, who in turn passed it along to the Orange Twin label. Orange Twin released the album in February 2006.
ground_truth: $363 billion
sub_queries: Birdbrain >> performer Answer: Buffalo Tom
Buffalo Tom >> location of formation Answer: Boston
What is the economy of Boston ? Answer: $363 billion