Please answer the following question: Information: - The P.J. Barrett Block is a historic block at 70 -- 76 Park Street in Adams , Massachusetts . It is one of the four brick buildings on Park Street along with the Jones Block , Armory Block , and the Mausert Block , opposite the Town Hall . The block was built in roughly 1880 , during a period of rapid industrial expansion in Adams . The original uses of the building were to provide retail shops on the ground floor and apartment - style housing above , a common feature of buildings of the period . It has a somewhat utilitarian appearance , which may be reflective of the relative haste in which it was designed and built . The building has a brick face , and the windows on the upper floors have curved pediments . The building was listed on the National Register of Historic Places in 1982 . - The National Register of Historic Places (NRHP) is the United States federal government's official list of districts, sites, buildings, structures, and objects deemed worthy of preservation. A property listed in the National Register, or located within a National Register Historic District, may qualify for tax incentives derived from the total value of expenses incurred preserving the property. - Adams is a town in northern Berkshire County, Massachusetts, United States. It is part of the Pittsfield, Massachusetts Metropolitan Statistical Area. The population was 8,485 at the 2010 census. - The Jones Block is a historic commercial building at 4953 Park Street in Adams, Massachusetts. It is a three story brick structure, topped by a flat roof, with a decorative band and dentil molding at the roof line, and round-arch windows on the upper floors. It is one of the four brick buildings on Park Street, along with the P. J. Barrett Block, Armory Block, and the Mausert Block, opposite the Town Hall. The block was built sometime in the last 20 years of the 19th century, during Adams' period of rapid growth due to industrialization. It was added to the National Register of Historic Places in 1982. - A census is the procedure of systematically acquiring and recording information about the members of a given population. It is a regularly occurring and official count of a particular population. The term is used mostly in connection with national population and housing censuses; other common censuses include agriculture, business, and traffic censuses. The United Nations defines the essential features of population and housing censuses as "individual enumeration, universality within a defined territory, simultaneity and defined periodicity", and recommends that population censuses be taken at least every 10 years. United Nations recommendations also cover census topics to be collected, official definitions, classifications and other useful information to co-ordinate international practice. - Mausert Block is a historic block at 1927 Park Street in Adams, Massachusetts designed in the Romanesque architectural style. It is one of the four brick buildings on Park Street along with the P. J. Barrett Block, Jones Block, and Armory Block. - The Massachusetts National Guard was founded as the Massachusetts Bay Colonial Militia on December 13, 1636, and contains the oldest units in the United States Army. It is currently headquartered at Hanscom Air Force Base and commanded by Major General L. Scott Rice. - In the United States, a metropolitan statistical area (MSA) is a geographical region with a relatively high population density at its core and close economic ties throughout the area. Such regions are neither legally incorporated as a city or town would be, nor are they legal administrative divisions like counties or separate entities such as states. As such, the precise definition of any given metropolitan area can vary with the source. A typical metropolitan area is centered on a single large city that wields substantial influence over the region (e.g.,Chicago or Atlanta). However, some metropolitan areas contain more than one large city with no single municipality holding a substantially dominant position (e.g.,DallasFort Worth metroplex, Norfolk-Virginia Beach (Hampton Roads), RiversideSan Bernardino (Inland Empire) or MinneapolisSaint Paul). - Massachusetts ; officially the Commonwealth of Massachusetts, is the most populous state in the New England region of the northeastern United States. It is bordered by the Atlantic Ocean to the east, the states of Connecticut and Rhode Island to the south, New Hampshire and Vermont to the north, and New York to the west. The state is named for the Massachusett tribe, which once inhabited the area. The capital of Massachusetts and the most populous city in New England is Boston. Over 80% of Massachusetts' population lives in the Greater Boston metropolitan area, a region influential upon American history, academia, and industry. Originally dependent on agriculture, fishing and trade, Massachusetts was transformed into a manufacturing center during the Industrial Revolution. During the 20th century, Massachusetts' economy shifted from manufacturing to services. Modern Massachusetts is a global leader in biotechnology, engineering, higher education, finance, and maritime trade. - A tax incentive is an aspect of a country's tax code designed to incentivize, or encourage a particular economic activity. - Armory Block is a historic block at 39-45 Park Street in Adams, Massachusetts. It is one of the four large brick buildings on Park Street along with the P. J. Barrett Block, Jones Block, and the Mausert Block, opposite the Town Hall. It was built in 1894 by A.J. Daniel, a developer from a locally prominent family. The building was built in c. 1895 to serve as an armory for the Massachusetts National Guard, a role it fulfilled until new facilities were built in 1914. After it was decommissioned from military use it was converted into commercial and retail space, uses which continue today. The building was listed on the National Historic Register in 1982. Given the information, choose the subject and object entities that have the relation of 'instance of'.
A:
p. j. barrett block , commercial building