Question: What's the place of birth of the developer of Portrait of Seymour H. Knox?

full_context: Document 1: Washington Crossing Bridge (Pittsburgh): The Washington Crossing Bridge, commonly known as the Fortieth Street Bridge, is an arch bridge that carries vehicular traffic across the Allegheny River between the Pittsburgh neighborhood of Lawrenceville and the suburb of Millvale.
Document 2: Highland Park Bridge (1902): The 1902 Highland Park Bridge was a cantilever through truss that carried two streetcar tracks across the Allegheny River and Sixmile Island between the Pittsburgh neighborhood of Highland Park and Sharpsburg, Pennsylvania. It was replaced by the Highland Park Bridge in 1938.
Document 3: 30th Street Bridge: The 30th Street Bridge, is a girder bridge that carries vehicular traffic across the Allegheny River between the Pittsburgh neighborhoods of Troy Hill and Herrs Island (known by the moniker of Washington's Landing). This is the fourth bridge that has stood on this site. A wooden 19th Century bridge was washed away during an 1882 flood. This was replaced by an arch bridge that spanned the entire width of the Allegheny River; after a 1921 fire destroyed the span across the main channel, the 31st Street Bridge was constructed as a replacement, and this bridge was again relegated to taking traffic to Herrs Island. A 1939 truss bridge then stood on this site, and it was replaced by the current structure as part of the redevelopment of the island to feature condominiums and a business park instead of warehouses and stockyards.
Document 4: Portrait of Countess Albazzi: Portrait of Countess Albazzi, a painting by Édouard Manet, became a part of the Thannhauser Collection of the Solomon R. Guggenheim Museum as a bequest of Hilde Thannhauser.
Document 5: Beauty Revealed: Goodridge gave the portrait to statesman Daniel Webster, who was a frequent subject and possibly a lover, following the death of his wife; she may have intended to provoke him into marrying her. Although Webster married someone else, his family held onto the portrait until the 1980s, when it was auctioned at Christie's and acquired by Gloria and Richard Manney in 1981. The couple donated or sold the miniatures of their art collection, including "Beauty Revealed", to the Metropolitan Museum of Art in 2006.
Document 6: Portrait of Captain Thomas Coram: Portrait of Captain Thomas Coram is a 1740 portrait of philanthropist Thomas Coram painted by William Hogarth. The portrait, which represents Hogarth’s highest achievement in direct portraiture, was not created as a commission and was instead donated to Coram's Foundling Hospital. The portrait is divided into two sections: The left side represents Coram's sea ventures, a major source of his wealth. The right side shows a curtain pulled over a mother figure with a child/
Document 7: Andrew W. Mellon Foundation: The Andrew W. Mellon Foundation of New York City in the United States is a private foundation with five core areas of interest, and endowed with wealth accumulated by Andrew W. Mellon of the Mellon family of Pittsburgh, Pennsylvania. It is the product of the 1969 merger of the Avalon Foundation and the Old Dominion Foundation. These foundations were set up separately by Paul Mellon and Ailsa Mellon Bruce, the children of Andrew W. Mellon. It is housed in the expanded former offices of the Bollingen Foundation in New York City, another educational philanthropy supported by Paul Mellon. Elizabeth Alexander is the Foundation's president. Her predecessors have included Earl Lewis, Don Randel, William G. Bowen, John Edward Sawyer, and Nathan Pusey. In 2004, the Foundation was awarded the National Medal of Arts.
Document 8: Camouflage Self-Portrait: Self-Portrait is a 1986 work by the American artist Andy Warhol. The portrait is in a camouflage-patterned foreground with a black background.
Document 9: Portrait of a Commander: Portrait of a Commander or A Commander Being Dressed for Battle is a portrait of an unknown man in plate armour, normally attributed to Peter Paul Rubens. In July 2010 it was sold for £9 million by Christie's after Sotheby's turned it down, suspecting its authenticity as a Rubens. In December 2011, the portrait was placed on loan with the Metropolitan Museum of Art in New York.
Document 10: Andy Warhol Bridge: The bridge was renamed for Warhol on March 18, 2005, as part of the tenth anniversary celebration for the Andy Warhol Museum. The museum is nearby at 117 Sandusky Street, a street which leads to the bridge from the north side of the river on Pittsburgh's North Shore.
Document 11: 31st Street Bridge: The William Raymond Prom Memorial Bridge, commonly known as the 31st Street Bridge, is an arch bridge that carries vehicular traffic across the Allegheny River between the Pittsburgh neighborhoods of Troy Hill and the Strip District. The bridge passes over, but does not serve, Washington's Landing, which is connected to the mainland by the 30th Street Bridge. Sidewalks along the bridge feature viewing platforms.
Document 12: Brady Street Bridge: The Brady Street Bridge, also known as the South 22nd Street Bridge, was a steel bowstring arch bridge in Pittsburgh, Pennsylvania, which crossed over the Monongahela River at South 22nd Street. It was replaced by the Birmingham Bridge in 1976, and was demolished on May 29, 1978. The bridge's main span was a tied arch with a suspended road deck, with two through-truss side spans, carrying two traffic lanes between Brady Street on the Pittsburgh side and South 22nd Street on the south side. Approach viaducts were built at either end. The bridge was built by the Schultz Bridge and Iron Company.
Document 13: South Tenth Street Bridge: South Tenth Street Bridge, most often called the Tenth Street Bridge, but officially dubbed the Philip Murray Bridge, is a suspension bridge spanning the Monongahela River in Downtown Pittsburgh, Pennsylvania. The bridge was renamed on Labor Day 2007 for Philip Murray, the first president of the United Steelworkers of America.
Document 14: Portrait of Professor Benjamin H. Rand: The portrait was the first Eakins made of someone outside his family. It is a prelude to what he considered his most important painting, "The Gross Clinic" (1875). Rand donated it to Jefferson Medical College when he retired.
Document 15: Portrait of Seymour H. Knox: Portrait of Seymour H. Knox is a 1985 portrait by Andy Warhol of Seymour H. Knox II. It was donated by the families of his two sons, Mr. and Mrs. Seymour H. Knox III and Mrs. and Mrs. Northrup R. Knox, to the Albright-Knox Art Gallery in honor of Seymour H. Knox II for his 60-year contribution as a member of the Buffalo Fine Arts Academy.
ground_truth: Pittsburgh
sub_queries: Who developed Portrait of Seymour H. Knox? Answer: Andy Warhol
Andy Warhol >> place of birth Answer: Pittsburgh