Please answer the following question: Information:  - A saltbox house is a traditional New England style of house with a long, pitched roof that slopes down to the back, generally a wooden frame house. A saltbox has just one story in the back and two stories in the front. The flat front and central chimney are recognizable features, but the asymmetry of the unequal sides and the long, low rear roof line are the most distinctive features of a saltbox, which takes its name from its resemblance to a wooden lidded box in which salt was once kept.  - Middlesex County is a county in the Commonwealth of Massachusetts, in the United States. As of 2014, the estimated population was 1,570,315, making it the twenty-third most populous county in the United States, and the most populous county in both Massachusetts and New England. For administrative purposes the county held two regions, Middlesex-North with its county seat in Lowell, and Middlesex-South with its county seat in Cambridge.  - A roof is part of a building envelope. It is the covering on the uppermost part of a building or shelter which provides protection from animals and weather, notably rain or snow, but also heat, wind and sunlight. The word also denotes the framing or structure which supports that covering.  - Medford is a city 3.2 miles northwest of downtown Boston on the Mystic River in Middlesex County, Massachusetts, United States. In the 2010 U.S. Census, Medford's population was 56,173. It is home to Tufts University.  - Wood is a porous and fibrous structural tissue found in the stems and roots of trees, and other woody plants. It is an organic material, a natural composite of cellulose fibers which are strong in tension embedded in a matrix of lignin which resists compression. Wood is sometimes defined as only the secondary xylem in the stems of trees, or it is defined more broadly to include the same type of tissue elsewhere such as in the roots of trees or shrubs. In a living tree it performs a support function, enabling woody plants to grow large or to stand up by themselves. It also conveys water and nutrients between the leaves, other growing tissues, and the roots. Wood may also refer to other plant materials with comparable properties, and to material engineered from wood, or wood chips or fiber.  - New England is a geographical region comprising six states of the northeast United States: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont. It is bordered by the state of New York to the west and south, and the Canadian provinces of New Brunswick and Quebec to the northeast and north, respectively. The Atlantic Ocean is to the east and southeast, and Long Island Sound is to the south. Boston is its largest city. Its largest metropolitan area is Greater Boston, which also includes Worcester (the second-largest city in New England), Manchester (the largest city in New Hampshire), and Providence (the capital and largest city of Rhode Island), with nearly a third of the entire region's population.  - Tufts University is a private research university incorporated in the municipality of Medford, Massachusetts, United States. Tufts College was founded in 1852 by Christian Universalists who worked for years to open a non-sectarian institution of higher learning. Charles Tufts donated the land for the campus on Walnut Hill, the highest point in Medford, saying that he wanted to set a "light on the hill." The name was changed to Tufts University in 1954, although the corporate name remains "the Trustees of Tufts College." For more than a century, Tufts was a small New England liberal arts college. The French American nutritionist and former professor at the Harvard School of Public Health Jean Mayer became president of Tufts in the late 1970s and, through a series of rapid acquisitions, transformed the school into a larger research university.  - The Mystic River is a river in Massachusetts, in the United States. Its name derives from the Wampanoag word "muhs-uhtuq", which translates to "big river." In an Algonquian language, "Missi-Tuk" means "a great river whose waters are driven by waves", alluding to the original tidal nature of the Mystic. It lies to the north of and flows approximately parallel to the lower portions of the Charles River.  - The Edward Oakes House is a historic house at 5 Sylvia Road in Medford , Massachusetts . It is a 2 - 1/2 story timber frame house , five bays wide , with a gambrel roof , wood shingle siding , and a brick foundation . A rear leanto section gives the house a saltbox appearance . The main entrance is flanked by sidelight windows . It was built c. 1728 , probably by Edward Oakes . It is one of the oldest surviving wood frame houses in Medford , and is unusual for the period due to its gambrel roof . The house was listed on the National Register of Historic Places in 1980 .  - A chimney is a structure that provides ventilation for hot flue gases or smoke from a boiler, stove, furnace or fireplace to the outside atmosphere. Chimneys are typically vertical, or as near as possible to vertical, to ensure that the gases flow smoothly, drawing air into the combustion in what is known as the stack, or chimney, effect. The space inside a chimney is called a "flue". Chimneys may be found in buildings, steam locomotives and ships. In the United States, the term smokestack (colloquially, stack) is also used when referring to locomotive chimneys or ship chimneys, and the term funnel can also be used.  - Boston (pronounced ) is the capital and most populous city of the Commonwealth of Massachusetts in the United States. Boston is also the seat of Suffolk County, although the county government was disbanded on July 1, 1999. The city proper covers with an estimated population of 667,137 in 2015, making it the largest city in New England and the 23rd most populous city in the United States. The city is the economic and cultural anchor of a substantially larger metropolitan area known as Greater Boston, a Metropolitan Statistical Area (MSA) home to a census-estimated 4.7 million people in 2014 and ranking as the tenth-largest such area in the country. Alternately, as a Combined Statistical Area (CSA), this wider commuting region is home to some 8.1 million people, making it the sixth-largest as such in the United States.    After reading the paragraphs above, we are interested in knowing the entity with which 'edward oakes house' exhibits the relationship of 'instance of'. Find the answer from the choices below.  Choices: - 1  - area  - atmosphere  - box  - building  - campus  - capital  - census  - century  - chimney  - city  - country  - county  - drawing  - england  - function  - furnace  - hill  - house  - institution  - island  - language  - material  - may  - metropolitan statistical area  - municipality  - part  - people  - plant  - point  - population  - public  - rapid  - research university  - river  - roof  - saltbox  - saying  - space  - stack  - state  - structure  - term  - the city  - tissue  - tree  - two  - university  - water  - wind  - word
Answer:
building