Question: Stephen V. Harkness was a businessman who was a silent partner in Standard Oil, helping which business magnate?

full_context: Document 1: Alida Rockefeller Messinger: Alida Ferry Rockefeller (born 1948) is an American philanthropist. She is the youngest daughter of John Davison Rockefeller III (1906–1978) and Blanchette Ferry Hooker (1909–1992), and a fourth-generation member of the Rockefeller family. Her brother is former Senator John Davison "Jay" Rockefeller IV (born 1937). According to an account in "The New York Times", Alida was only five years old when her father began to teach her about philanthropy. She said:
Document 2: David Rockefeller: David Rockefeller (June 12, 1915 – March 20, 2017) was an American banker who was chairman and chief executive of Chase Manhattan Corporation. He was the oldest living member of the Rockefeller family and family patriarch from August 2004 until his death in March 2017. Rockefeller was a son of John D. Rockefeller Jr. and Abby Aldrich Rockefeller, and a grandson of John D. Rockefeller and Laura Spelman Rockefeller.
Document 3: John D. Rockefeller: John Davison Rockefeller Sr. (July 8, 1839 – May 23, 1937) was an American oil industry business magnate and philanthropist. Widely considered the wealthiest American of all time and the richest person in modern history, Rockefeller was born into a large family in upstate New York and was shaped by his con man father and religious mother. His family moved several times before eventually settling in Cleveland, Ohio.
Document 4: Rockefeller Brothers Fund: The Rockefeller Brothers Fund (RBF) is a philanthropic foundation created and run by members of the Rockefeller family. It was founded in New York City in 1940 as the primary philanthropic vehicle for the five third-generation Rockefeller brothers: John D. Rockefeller III, Nelson, Laurance, Winthrop and David. It is distinct from the Rockefeller Foundation. The Rockefellers are an industrial, political, and banking family that made one of the world's largest fortunes in the oil business during the late 19th and early 20th centuries.
Document 5: Forest Hill, Ohio: Forest Hill is an historic neighborhood spanning parts of Cleveland Heights and East Cleveland, Ohio, and is bordered to the north by Glynn Road, the south by Mayfield Road, by Lee Boulevard to the west and North Taylor Road to the east. Forest Hill was once the beloved summer home of oil magnate John D. Rockefeller and his family. John D. Rockefeller, Jr. purchased the estate from his father in 1923 and, with New York City architect Andrew J. Thomas, planned an upscale residential and commercial development featuring distinctive French Norman style architecture. Although the Great Depression forced Rockefeller to suspend operations, following World War II others were drawn to Forest Hill to build comfortable colonial and contemporary ranch homes on the remaining open land. Design principles of the Rockefeller-Thomas plan were extended to the later development and today Forest Hill is a rich tapestry of people, homes and gardens.
Document 6: H. W. Harkness: Harvey Willson “H.W.” Harkness (May 25, 1821 – July 10, 1901) was an American mycologist and natural historian best known for his early descriptions of California fungal species. Born and raised in Massachusetts and trained as a physician, Harkness came to California during the Gold Rush in 1849. He rose to prominence as physician, educator, real estate developer, and newspaper editor in Sacramento, becoming part of the social circle of early California notables such as Leland Stanford, Charles Crocker, Collis Huntington, and Mark Hopkins. Harkness was a participant in the ceremony marking the completion of the First Transcontinental Railroad, representing California and bearing the Golden Spike that was driven by Leland Stanford marking the completion of the railroad.
Document 7: John Jacob Astor: John Jacob Astor (July 17, 1763 – March 29, 1848) (born Johann Jakob Astor) was a German–American businessman, merchant, real estate mogul and investor who mainly made his fortune in fur trade and by investing in real estate in or around New York City.
Document 8: Rockefeller family: The Rockefeller family ( ) is an American industrial, political, and banking family that made one of the world's largest fortunes in the oil business during the late 19th and early 20th centuries, with John D. Rockefeller and his brother William Rockefeller primarily through Standard Oil. The family is also known for its long association with and control of Chase Manhattan Bank. They are considered to be one of the most powerful families, if not the most powerful family, in the history of the United States.
Document 9: Charles W. Harkness: Charles William Harkness (December 17, 1860 – May 1, 1916) was a son of Stephen V. Harkness, an original investor in the company that became Standard Oil, and his second wife, the former Anna M. Richardson.
Document 10: John D. Rockefeller III: John Davison Rockefeller III (March 21, 1906 – July 10, 1978) was a philanthropist and third-generation member of the prominent Rockefeller family. He was the eldest son of philanthropists John D. Rockefeller Jr. and Abby Aldrich Rockefeller. His siblings were Abby, Nelson, Laurance, Winthrop, and David.
Document 11: Lamon V. Harkness: Lamon Vanderburgh Harkness (January 6, 1850 – January 17, 1915) was an American businessman and one of the largest stockholders in Standard Oil . Lamon V. Harkness became involved with Standard Oil through his father Stephen V. Harkness who was a primary silent investor in the formation of Standard Oil.
Document 12: Stephen V. Harkness: Stephen Vanderburgh Harkness (November 18, 1818 – March 6, 1888) was an American businessman from Cleveland, Ohio, who invested as a silent partner with oil titan John D. Rockefeller, Sr. in the founding of Standard Oil. He was a director of Standard Oil until his death.
Document 13: Rockefeller, Andrews &amp; Flagler: Rockefeller, Andrews & Flagler was a business concern formed in 1867 in Cleveland, Ohio which was a predecessor of the Standard Oil Company. The principals and namesakes were John D. Rockefeller, William Rockefeller, Samuel Andrews, and Henry M. Flagler. Flagler’s step-brother Stephen V. Harkness made substantial investments, but was a silent partner and did not take an active role in running the business but he was actually the second largest stockholder next to JD Rockefeller.
Document 14: Rockefeller Park: Rockefeller Park is a city park named in honor of oil magnate John D. Rockefeller Sr., located in Cleveland, Ohio. Part of the Cleveland Public Parks District, Rockefeller Park is immediately adjacent Wade Park to the southeast, and across Euclid Ave on its northwest border. Besides the distinction of being the largest park located completely within city limits, Rockefeller Park is a link in a chain of parkland that connects the heights region of the eastern suburbs to the city's lakefront. Following the path of Martin Luther King Jr. Drive and spanning a large section of Cleveland's East Sides, the park runs in a northwesterly path between suburban Shaker Heights, bisecting the University Circle neighborhood and terminating at Gordon Park on the city's lakefront, opened to the public in 1897.
Document 15: John Dustin Archbold: John Dustin Archbold (July 26, 1848 in Leesburg, Ohio – December 6, 1916 in Tarrytown, New York) was an American capitalist and one of the United States' earliest oil refiners. His small oil company was bought out by John D Rockefeller's Standard Oil Company. Archbold rose rapidly at Standard Oil, handling many of the complex secret negotiations over the years. By 1882 he was Rockefeller's closest associate, and typically acted as the company's primary spokesman. Rockefeller after 1896 left business matters to Archbold while he pursued his philanthropy; as vice president Archbold effectively ran Standard Oil until his death in 1916. Inspired by Rockefeller's policies, Archbold's main goals were stabilization, efficiency, and minimizing waste in refining and distributing petroleum products. The company was broken up by the Supreme Court in 1911 into three dozen smaller operations, Archbold became president of the largest one, Standard Oil of New Jersey.
ground_truth: John Davison Rockefeller Sr.