Question: What is the pyramid building in the city where the band Tin Hat was formed?

full_context: Document 1: Eritrea: Eritrea's ethnic groups each have their own styles of music and accompanying dances. Amongst the Tigrinya, the best known traditional musical genre is the guaila. Traditional instruments of Eritrean folk music include the stringed krar, kebero, begena, masenqo and the wata (a distant/rudimentary cousin of the violin). The most popular Eritrean artist is the Tigrinya singer Helen Meles, who is noted for her powerful voice and wide singing range. Other prominent local musicians include the Kunama singer Dehab Faytinga, Ruth Abraha, Bereket Mengisteab, Yemane Baria, and the late Abraham Afewerki.
Document 2: Prudential Tower: The Prudential Tower, also known as the Prudential Building or, colloquially, The Pru, is an International Style skyscraper in Boston, Massachusetts. The building, a part of the Prudential Center complex, currently stands as the 2nd - tallest building in Boston, behind 200 Clarendon Street, formerly the John Hancock Tower. The Prudential Tower was designed by Charles Luckman and Associates for Prudential Insurance. Completed in 1964, the building is 749 feet (228 m) tall, with 52 floors, and (as of February 2018) is tied with others as the 96th - tallest in the United States. It contains 1,200,000 sq ft (110,000 m) of commercial and retail space. Including its radio mast, the tower stands as the tallest building in Boston, rising to 907 feet (276 m) in height.
Document 3: A cappella: A cappella is gaining popularity among South Asians with the emergence of primarily Hindi-English College groups. The first South Asian a cappella group was Penn Masala, founded in 1996 at the University of Pennsylvania. Co-ed South Asian a cappella groups are also gaining in popularity. The first co-ed south Asian a cappella was Anokha, from the University of Maryland, formed in 2001. Also, Dil se, another co-ed a cappella from UC Berkeley, hosts the "Anahat" competition at the University of California, Berkeley annually. Maize Mirchi, the co-ed a cappella group from the University of Michigan hosts "Sa Re Ga Ma Pella", an annual South Asian a cappella invitational with various groups from the Midwest.
Document 4: Tin Hat: Tin Hat (formerly the Tin Hat Trio) is an acoustic chamber music group currently based in San Francisco, California. Their music combines many genres of music, including jazz, southern blues, bluegrass, neoclassical, eastern European folk music, and avant-garde.
Document 5: William Pereira: William Leonard Pereira (April 25, 1909 – November 13, 1985) was an American architect from Chicago, Illinois, who was noted for his futuristic designs of landmark buildings such as the Transamerica Pyramid in San Francisco. Remarkably prolific, he worked out of Los Angeles, and was known for his love of science fiction and expensive cars, but mostly for his unmistakable style of architecture, which helped define the look of mid-20th century America.
Document 6: Transamerica Pyramid: The Transamerica Pyramid at 600 Montgomery Street between Clay and Washington Streets in the Financial District of San Francisco, California, United States, is a 48 - story postmodern building and the second - tallest skyscraper in the San Francisco skyline. Its height will be surpassed by Salesforce Tower, currently under construction. The building no longer houses the headquarters of the Transamerica Corporation, which moved its U.S. headquarters to Baltimore, Maryland, but it is still associated with the company and is depicted in the company's logo. Designed by architect William Pereira and built by Hathaway Dinwiddie Construction Company, at 853 feet (260 m), on completion in 1972 it was the eighth - tallest building in the world.
Document 7: The Gurdjieff Ensemble: "The Gurdjieff Folk Instruments Ensemble" based in Armenia was founded in 2008, and is led by the Armenian musician, Levon Eskenian. The Ensemble’s awards include the prestigious Dutch Edison Award: Best World Music Album 2012 and Armenian National Music Award: Best Folk Music Album 2011, for their album, “Music of Georges I. Gurdjieff,’’ produced by ECM Records. The ensemble consists of Armenia’s leading practitioners of traditional music performing on Duduk, Blul, Kamancha, Oud, Kanōn, Santur, Tar/Saz, Dap/Daf, Dhol, and Tombak. The repertoire is composed of the “mystic and spiritual teacher,” George I. Gurdjieff's Armenian, Greek, Assyrian, Arabic, Kurdish, Caucasian spiritual and folk music, authentically arranged for Eastern instruments by Eskenian. The repertoire also includes additional Eastern music that exemplifies Gurdjieff’s musical influences during his travels in the East.
Document 8: 1201 Third Avenue: 1201 Third Avenue (formerly Washington Mutual Tower) is a , 55-story skyscraper in Downtown Seattle, in the U.S. state of Washington. It is the second-tallest building in the city, the eighth-tallest on the West Coast of the United States, and the 74th-tallest in the United States. Developed by Wright Runstad & Company, construction began in 1986 and finished in 1988. 1201 Third Avenue was designed by Kohn Pedersen Fox Associates and The McKinley Architects. The building was the world headquarters of the financial company Washington Mutual from the building's opening until 2006, when the company moved across the street to the WaMu Center (renamed the Russell Investments Center after the bank collapsed in 2008).
Document 9: Amy Denio: Amy Denio (born June 9, 1961) is a Seattle (USA)-based multi-instrumental composer of soundtracks for modern dance, film and theater, as well as a songwriter and music improviser. Often called an unclassifiable "avant-garde" jazz musician, she is also deeply inspired by world music. She is probably best known as a vocalist, accordionist and saxophone-player. Among her current musical involvements are The Tiptons Sax Quartet (formerly The Billy Tipton Memorial Saxophone Quartet) and Die Resonanz Stanonczi, a radical folk group based in Salzburg, Austria. She has also collaborated repeatedly with the Pat Graney Dance Company, David Dorfman Dance Company, Victoria Marks, and with many other choreographers.
Document 10: Mandolin: Jethro Burns, best known as half of the comedy duo Homer and Jethro, was also the first important jazz mandolinist. Tiny Moore popularized the mandolin in Western swing music. He initially played an 8-string Gibson but switched after 1952 to a 5-string solidbody electric instrument built by Paul Bigsby. Modern players David Grisman, Sam Bush, and Mike Marshall, among others, have worked since the early 1970s to demonstrate the mandolin's versatility for all styles of music. Chris Thile of California is a well-known player, and has accomplished many feats of traditional bluegrass, classical, contemporary pop and rock; the band Nickel Creek featured his playing in its blend of traditional and pop styles, and he now plays in his band Punch Brothers. Most commonly associated with bluegrass, mandolin has been used a lot in country music over the years. Some well-known players include Marty Stuart, Vince Gill, and Ricky Skaggs.
Document 11: Ultima Tower: The Ultima Tower is a hypothetical supertall skyscraper, designed by American architect Eugene Tsui in 1991. It has been envisioned to be built in San Francisco, California and could accommodate up to 1 million people. With a total height of , the tower would be 2 miles tall, and comprise 500 stories if built. It is one of the tallest buildings/man-made structures ever conceived.
Document 12: Grammy Award for Best American Roots Performance: According to NARAS, the new award will encompass all of the subgenres of the American Roots category field, which include Americana, bluegrass, blues, folk and other forms of regional roots music. The category will be open for solo artists, duos, groups and other collaborations and is for singles or tracks only.
Document 13: Salesforce Tower: Salesforce Tower, formerly known as the Transbay Tower, is a 1,070 - foot (326 m) office skyscraper under construction in the South of Market district of downtown San Francisco. It is located at 415 Mission Street between First and Fremont Streets, next to the Transbay Transit Center site. Salesforce Tower is the centerpiece of the San Francisco Transbay redevelopment plan. The plan contains a mix of office, transportation, retail, and residential uses. When completed, the tower will be the tallest in San Francisco. With a top roof height of 970 feet (296 m) and an overall height of 1,070 feet (326 m), it will be the second - tallest building west of the Mississippi River after the Wilshire Grand Center in Los Angeles.
Document 14: 580 California Street: 580 California Street is a high rise office building completed in 1987 in the Financial District of San Francisco, California. The postmodern, , 23 story tower is bordered by Kearny Street and California Street, and is topped with three faceless, twelve foot tall statues, on each side of the building on the twenty-third floor. The art installation is entitled "The Corporate Goddesses" by Muriel Castanis, the late designer and creator of the sculptures.
Document 15: Houston: Centered on Post Oak Boulevard and Westheimer Road, the Uptown District boomed during the 1970s and early 1980s when a collection of mid-rise office buildings, hotels, and retail developments appeared along Interstate 610 west. Uptown became one of the most prominent instances of an edge city. The tallest building in Uptown is the 64-floor, 901-foot (275 m)-tall, Philip Johnson and John Burgee designed landmark Williams Tower (known as the Transco Tower until 1999). At the time of construction, it was believed to be the world's tallest skyscraper outside of a central business district. The new 20-story Skanska building and BBVA Compass Plaza are the newest office buildings built in Uptown after 30 years. The Uptown District is also home to buildings designed by noted architects I. M. Pei, César Pelli, and Philip Johnson. In the late 1990s and early 2000s decade, there was a mini-boom of mid-rise and high-rise residential tower construction, with several over 30 stories tall. Since 2000 more than 30 high-rise buildings have gone up in Houston; all told, 72 high-rises tower over the city, which adds up to about 8,300 units. In 2002, Uptown had more than 23 million square feet (2,100,000 m²) of office space with 16 million square feet (1,500,000 m²) of Class A office space.
ground_truth: Transamerica Pyramid
sub_queries: Tin Hat >> location of formation Answer: San Francisco
what is the pyramid building in San Francisco Answer: Transamerica Pyramid