Question: Where is the private research university that Stephen Salisbury III is a trustee of located?

Context paragraphs:
Salisbury Mansion and Store: The Salisbury Mansion and Store is an historic house museum at 40 Highland Street in Worcester, Massachusetts.  The house was originally built on Lincoln Square in 1772 by Stephen Salisbury I with an attached storehouse from which he sold imported goods under the name "S. & S. Salisbury".  He and his brother Samuel had originally been in business together selling hardware goods in Boston, and Stephen moved to Worcester to expand the operation.  In 1820 the store was closed down, and the space was converted for residential use by the family, which occupied it until 1851.  Thereafter it served as a girls' school, tenant house, and then a gentleman's social club until 1929, when the building was threatened with demolition by the then occupants, the Worcester Lincoln Square Boys Club, who wanted to build more modern premises.  It was saved by local efforts and moved to its current location on the former Salisbury estate near the museum and next to Salisbury House.  It was donated to the American Antiquarian Society, which promptly gave it to the Worcester Art Museum, both of which were founded by Stephen Salisbury III.  The museum undertook to restore the much-altered building to its condition as of 1830, and opened it for group tours as a historic house museum.

Salisbury Factory Building: There are two historic Salisbury Factory Buildings in Worcester, Massachusetts.  The first of these, at 25 Union Street, was built in 1879, and is a five story brick building with modest Victorian Gothic trim.  The second, at 49-51 Union Street, was built in 1882, is a three story brick building designed by local architect Stephen Earle.  These two buildings are the only ones that survive of a series of factory buildings built by Stephen Salisbury II and Stephen Salisbury III in the Lincoln Square area north of Worcester's downtown.  The Salisburys rented space out to small manufacturers in these buildings, introducing a trend that dominated the industrial development of the city.  Most of their buildings were demolished during redevelopment of the area in the 20th century.

Edward Herbert Thompson: Edward H. Thompson was born in Worcester, Massachusetts.  Initially inspired by the books of John Lloyd Stephens, Thompson devoted much of his career to study of the Maya civilization.  In 1879, "Popular Science Monthly" published "Atlantis Not a Myth", an article by Thompson in which he argued that the ancient Mayan monuments, which he had never seen except in books, were proof of the lost continent of Atlantis--an opinion which his later researches would change.  The article attracted the attention of Stephen Salisbury III, son of an American landowner and a benefactor of the American Antiquarian Society, who persuaded Thompson to move to Yucatán to explore the ruins on his behalf.  Thompson was later elected a member of the AAS in 1887.  Senator George Frisbie Hoar of Massachusetts agreed to help subsidize Thompson's efforts by recommending him for the post of United States consul to Yucatán.

Barely Blind: Barely Blind is an American rock band that was formed in Groves, Texas in 2003.  It is based in Los Angeles, California.  The band is composed of Bradley Cuccio (lead vocals, guitar), William Smith (drums), Reid Guidry (bass), and Stephen Salisbury (guitar, vocals).

University of Southern California: The University of Southern California (USC or SC) is a private research university located in Los Angeles, California.  Founded in 1880, it is the oldest private research university in California.  USC has historically educated a large number of the region's business leaders and professionals.  In recent decades, the university has also leveraged its location in Los Angeles to establish relationships with research and cultural institutions throughout Asia and the Pacific Rim.  An engine for economic activity, USC contributes $8 billion annually to the economy of the Los Angeles metropolitan area and California.

Hamdard University: Hamdard University (Urdu: ) is a private research university with campuses in Karachi and Islamabad, Pakistan.  It was founded in 1991 by the renowned philanthropist Hakim Said of the Hamdard Foundation.  Hamdard is one of the first and the oldest private institutions of higher education in Pakistan.  In Karachi, Hamdard University is the largest private research university with a campus area of over 350 acres.

Johns Hopkins University: The Johns Hopkins University (commonly referred to as Johns Hopkins, JHU, or simply Hopkins) is an American private research university in Baltimore, Maryland.  Founded in 1876, the university was named for its first benefactor, the American entrepreneur, abolitionist, and philanthropist Johns Hopkins.  His $7 million bequest—of which half financed the establishment of Johns Hopkins Hospital—was the largest philanthropic gift in the history of the United States at that time.  Daniel Coit Gilman, who was inaugurated as the institution's first president on February 22, 1876, led the university to revolutionize higher education in the U.S. by integrating teaching and research.  Adopting the concept of a graduate school from Germany's ancient Heidelberg University, Johns Hopkins University is considered the first research university in the United States.

Worcester Polytechnic Institute: Worcester Polytechnic Institute (WPI) is a private research university in Worcester, Massachusetts, focusing on the instruction and research of technical arts and applied sciences.

Stephen Salisbury Tuckerman: Stephen Salisbury Tuckerman (8 December 1830 Boston - 1904) was a United States painter.

Stephen Salisbury III: Stephen Salisbury III (1835 – 1905), also referred to as Stephen Salisbury, Jr., graduated from Harvard College in 1856.  The son of a wealthy landowner, Salisbury helped manage the family's extensive properties and businesses in Worcester County, Massachusetts.  Like his father, Salisbury served one term in the State Senate, was president of the Worcester National Bank, and directed the Worcester & Nashua Railroad.  He was a trustee of the Worcester City Hospital and the Worcester Polytechnic Institute.

Supporting paragraphs: Stephen Salisbury III Worcester Polytechnic Institute
Answer: Worcester, Massachusetts