Question: Are Larry Gagosian and Steve Dildarian both art dealers?

Context articles: CINOA
Antique Tribal Art Dealers Association
Gagosian Gallery
Bust of a Woman (Marie-Thérèse)
The Life &amp; Times of Tim
Geoffrey Agnew
Larry Gagosian
Steve Dildarian
Nathaniel L. McCready House
Hemphill Fine Arts

CINOA ("Confédération Internationale des Négociants en Oeuvres d'Art", or International Confederation of Art and Antique Dealers' Associations) is a Brussels-based international federation, founded in 1935, of antique and art dealers, representing five thousand dealers from thirty-two art and antique associations in twenty-two countries.
The Antique Tribal Art Dealers Association (ATADA), was founded in 1988, by a group of independent antique tribal art dealers to form a professional association of dealers that would provide education for the public and set standards for the trade.
 They recognized that tribal and ethnographic art had reached a level of specialization found in other art fields and were concerned by the volume of misidentified and pastiche materials on the market.
 Members offer buyers a guarantee that objects they sell are as represented regarding age, authenticity and extent of restoration.
Gagosian Gallery is a contemporary art gallery owned and directed by Larry Gagosian.
 There are sixteen gallery spaces: five in New York; three in London; two in Paris; one each in Beverly Hills, San Francisco, Rome, Athens, Geneva and Hong Kong.
Bust of a Woman (Marie-Thérèse) is a 1931 sculpture by the Spanish artist Pablo Picasso that depicts Marie-Thérèse Walter, who was Picasso's mistress at the time of its creation.
 In 2016 the ownership of the sculpture was the subject of a legal dispute between the State of Qatar and the American art dealer Larry Gagosian, who had resold the bust to Leon Black.
The Life & Times of Tim is an HBO comedy animated television series, which premiered on September 28, 2008.
 The series was created by Steve Dildarian, and is about a hapless man in his mid-20s named Tim (voiced by Dildarian) who lives in New York City with his girlfriend Amy.
 Throughout the series, Tim constantly finds himself in increasingly awkward situations in both his work and personal life.
Sir Geoffrey Agnew (11 July 1908 - 22 November 1986) was an English art dealer, the chairman of the family firm of art dealers, Thomas Agnew & Sons, and the "dean of London art dealers".
Lawrence Gilbert "Larry" Gagosian (born April 19, 1945) is an Armenian American art dealer who owns the Gagosian Gallery chain of art galleries.
 Working in concert with collectors including Douglas S. Cramer, Eli Broad and Keith Barish he developed a reputation for staging museum quality exhibitions.
Steve Dildarian (born November 3, 1969) is an American former advertising copywriter who is the creator, writer, producer and voice of Tim in the HBO animated television series "The Life & Times of Tim" (2008-2012).
The Nathaniel L. McCready House, also known as the Harkness Mansion, is a mansion at 4 East 75th Street on the Upper East Side of New York City.
 Completed in 1896 for Nathaniel L’Hommediue McCready, Jr., during the twentieth century it was occupied by Thomas J. Watson, Rebekah Harkness, whose name became associated with the building when she used it as the offices of the Harkness Ballet.
 In 2011, the home was purchased by Larry Gagosian, who demolished the mansion's interior.
Hemphill Fine Arts (Hemphill) is an art gallery in Washington, D.C. Founded by George Hemphill in 1993.
 In 2004, Hemphill Fine Arts relocated from a historic building in the Georgetown neighborhood to a former automobile showroom on 14th Street in Logan Circle.
 Hemphill Fine Arts is a member of the Association of International Photography Art Dealers (AIPAD) and the Washington Art Dealers Association.