Question: Who is older, Benjamin Grahm or Irving Kahn?

Context articles: Dick Robertson (songwriter)
Irving B. Kahn
Paul H. Irving
Elizabeth Irving
Benjamin Graham
Benjamin Kahn
Tonight You Belong to Me
The Sheik Steps Out
Irving Female College
Irving Kahn

Dick Robertson (New York City, 3 July 1903 - 1979) was an American popular big band singer and songwriter of the 1930s and 1940s.
 He sang for many bandleaders such as Leo Reisman and Roger Wolfe Kahn and His Orchestra, and was on the artist roster at Banner Records.
 In fact, he was one of the most prolific New York based vocalists (along with Irving Kaufman, Chick Bullock, Scrappy Lambert, Elmer Feldkamp, Paul Small and Smith Ballew) on scores of records from late 1928 through the mid 1930s.
 A series of records issued on Melotone/Perfect/Banner/Oriole/Romeo, Crown, Bluebird from 1930-1934 were issued under his name or are listed in the 2010 edition of ""American Dance Bands on Record and Film (1915-1942)"" by Richard J. Johnson and Bernard H. Shirley as being under his nominal leadership.
 His last recording session as a singer was in 1949.
 He also used the pseudonym Bob Richardson for some recordings on Mayfair Records.
Irving Berlin Kahn (c.1917–1994) was an American media proprietor.
 He was the founder of TelePrompTer Corporation and Cable TV.
Paul H. Irving is a social sector leader and entrepreneur focused on changing the culture of aging.
 As founder and chairman of the Center for the Future of Aging at Milken Institute and USC Davis School of Gerontology distinguished scholar in residence, Irving speaks, writes and convenes influencers in health, business, academia, philanthropy, media and other domains who are committed to redefining the public narrative about the roles and value of older adults.
 Irving's work has drawn increasing attention from across the country and the world.
 In 2016, PBS Next Avenue described him as "a key driver of the purposeful aging movement."
Dorothea Elizabeth Irving, Lady Brunner, OBE, JP (14 April 1904 – 9 January 2003) was a British actress, the daughter of actors H. B. Irving and Dorothea Baird, and the granddaughter of Victorian era stage star Henry Irving.
 Her older brother was the Hollywood set designer and art director Laurence Irving.
 Elizabeth Irving was the Chairman of the National Federation of Women's Institutes (W.I.) and in 1955 founded the "Keep Britain Tidy" Group, acting as President of the Group for 19 years from 1966.
Benjamin Graham ( ; born Benjamin Grossbaum; May 9, 1894 – September 21, 1976) was a British-born American investor, economist, and professor.
 He is widely known as the "father of value investing," and wrote two of the founding texts in neoclassical investing: "Security Analysis" (1934) with David Dodd, and "The Intelligent Investor" (1949).
 His investment philosophy stressed investor psychology, minimal debt, buy-and-hold investing, fundamental analysis, concentrated diversification, buying within the margin of safety, activist investing, and contrarian mindsets.
Benjamin Kahn (born 1955) is an Israeli marine biologist.
 He has been fighting for the survival of the Red Sea reef, which began dying when giant fish farms were built in 1997, and the cages were spewing tons of uneaten food and excrement onto the reef.
 Kahn appeared on Time Magazine's list of "Heroes of the Environment" October 2007.
"Tonight You Belong to Me" is a popular American song, written in 1926 by lyricist Billy Rose and composer Lee David.
 The first ever recording was made by Irving Kaufman in 1926 on Banner Records.
 In 1927 Gene Austin recorded it and the song became a major hit.
 Another popular recording during this time was by Roger Wolfe Kahn and his Orchestra.
The Sheik Steps Out is a 1937 American musical film directed by Irving Pichel and written by Adele Buffington and Gordon Kahn.
 The film stars Ramon Novarro, Lola Lane, Gene Lockhart, Kathleen Burke, Stanley Fields and Billy Bevan.
 It was released on September 6, 1937, by Republic Pictures.
Irving Female College, also known as Irving Manor Apartments and Seidle Memorial Hospital, is a historic school complex located in Mechanicsburg in Cumberland County, Pennsylvania.
 The complex consists of two buildings: Irving Hall and Columbian Hall.
 Irving Hall is the older building, dating from about 1856.
 It is a three-story, "U"-shaped brick building with wood trim in the Italianate style.
 An extension to the building was built about 1900.
 Columbian Hall, built in 1893, is a three-story, rectangular brick building with a wood frame addition.
 It is in a combined Italianate / Spanish Renaissance Revival style.
 It features a projecting stair tower with a semi-conical roof.
 Both Irving Hall and Columbian Hall were converted to apartments in the late-1930s.
 The complex formerly included a third building, known as "Argyle," which was the home of the Irving College president.
 Built in 1911, it was a rectangular Spanish Renaissance Revival style dwelling, with a low hipped roof and wraparound verandah.
 "Argyle" was demolished in 1991 to make room for expansion of Seidle Hospital.
Irving Kahn (December 19, 1905 – February 24, 2015) was an American investor and philanthropist.
 He was the oldest living active investor.
 He was an early disciple of Benjamin Graham, the creator of the value investing methodology.
 Kahn began his career in 1928 and continued to work until his death.
 He was chairman of Kahn Brothers Group, Inc., the privately owned investment advisory and broker-dealer firm that he founded with his sons, Thomas and Alan, in 1978.