Question: What borough is found in the county that holds the city where John Lambert died?

full_context: Document 1: John Lambert (politician): What is now the city of Lambertville was named in his honor in 1814 when the community's first post office was established.
Document 2: Malet Lambert School: Malet Lambert is a secondary school for 11- to 16-year-old pupils in Kingston upon Hull, East Riding of Yorkshire, England. The school is situated on James Reckitt Avenue in the east of the city, its front facade overlooks East Park. Malet Lambert opened in 1932 and became a grammar school in 1944 before becoming a community comprehensive in 1969. The school converted to academy status in September 2015.
Document 3: 6th Legislative District (New Jersey): New Jersey's 6th Legislative District is one of 40 in the New Jersey Legislature, covering the Burlington County municipality of Maple Shade Township and the Camden County municipalities of Berlin Township, Cherry Hill Township, Collingswood Borough, Gibbsboro Borough, Haddon Township, Haddonfield Borough, Hi-Nella Borough, Merchantville Borough, Oaklyn Borough, Pennsauken Township, Somerdale Borough, Stratford Borough, Tavistock Borough and Voorhees Township as of the 2011 apportionment.
Document 4: Benjamin Franklin: He was promoted to deputy postmaster-general for the British colonies in 1753, having been Philadelphia postmaster for many years, and this enabled him to set up the first national communications network. During the revolution, he became the first United States Postmaster General. He was active in community affairs and colonial and state politics, as well as national and international affairs. From 1785 to 1788, he served as governor of Pennsylvania. He initially owned and dealt in slaves but, by the 1750s, he argued against slavery from an economic perspective and became one of the most prominent abolitionists.
Document 5: List of municipalities in New Jersey: This is a list of the 565 municipalities in the U.S. state of New Jersey, ordered by population. There are five types of municipality in the state -- boroughs (250), cities (52), towns (15), townships (245), and villages (4). New Jersey, the fourth - smallest state, covers 8,722 square miles (22,590 km), meaning the average land size of a municipality in the state is about 15 square miles (39 km) -- but note the wide range of actual sizes in the map at right.
Document 6: Old Salem County Courthouse: Built in 1735, this building is the oldest active courthouse in New Jersey and is the second oldest courthouse still in continuous use in the United States. It was expanded in 1818 and 1908.
Document 7: Hunterdon Central Regional High School: Hunterdon Central Regional High School is a comprehensive, four-year public high school, and regional school district that serves students from five municipalities in east central Hunterdon County, New Jersey, United States. Students hail from Delaware Township, East Amwell Township, Flemington, Raritan Township and Readington Township.
Document 8: 15th Legislative District (New Jersey): New Jersey's 15th Legislative District is one of 40 in the New Jersey Legislature, covering the Hunterdon County municipalities of East Amwell Township, Lambertville City and West Amwell Township; and the Mercer County municipalities of Ewing Township, Hopewell Borough, Hopewell Township, Lawrence Township, Pennington Borough, Trenton City and West Windsor Township.
Document 9: 2nd Legislative District (New Jersey): New Jersey's 2nd Legislative District is one of 40 in the state, covering the Atlantic County municipalities of Absecon City, Atlantic City, Brigantine City, Buena Borough, Buena Vista Township Egg Harbor City, Egg Harbor Township, Folsom Borough, Hamilton Township, Linwood City, Longport Borough, Margate City, Mullica Township, Northfield City, Pleasantville City, Somers Point City and Ventnor City as of the 2011 apportionment. Except for an eight-year period from 1974 until 1982, the 2nd District is exclusively made up of municipalities from Atlantic County since 1967.
Document 10: 8th Legislative District (New Jersey): New Jersey's 8th Legislative District is one of 40 in the New Jersey Legislature, covering the Atlantic County municipality of Hammonton; the Burlington County municipalities of Eastampton Township, Evesham Township, Hainesport Township, Lumberton Township, Mansfield Township, Medford Township, Medford Lakes Borough, Mount Holly Township, Pemberton Borough, Pemberton Township, Shamong Township, Southampton Township, Springfield Township, Westampton Township and Woodland Township; and the Camden County municipalities of Berlin Borough, Pine Hill Borough, Pine Valley Borough and Waterford Township as of the 2011 apportionment.
Document 11: Hunterdon County Historical Society: The Hunterdon County Historical Society is a historical society located in Flemington, New Jersey dedicated to collecting, preserving, and sharing the history of Hunterdon County. The society began in 1885 as one room in the Flemington Public Library by Hiram E. Deats, who served as its librarian from 1891 until his death in 1963. Today, the society operates out of The Doric House, a Greek revival style home named for its exterior Doric columns. Its collection includes genealogies, Lenni Lenape artifacts, and over 5,000 county documents dating from 1825.
Document 12: Jackson County Courthouse (Jacksonville, Oregon): The Jackson County Courthouse is a former county courthouse in Jacksonville, Oregon, United States, built in 1883. The courthouse is a contributing property of the Jacksonville Historic District, which is listed on the National Register of Historic Places (NRHP). It was formerly the Jacksonville Museum owned by Jackson County and operated by the Southern Oregon Historical Society (SOHS), which also managed several other historic properties in Jacksonville. The museum in the courthouse closed in 2006 because of lack of funding. Ownership of the historic courthouse was transferred to the City of Jacksonville in 2012. The SOHS still operates Hanley Farm in Central Point and a research library in Medford.
Document 13: Latham, Oregon: Latham is an unincorporated community in Lane County, Oregon, United States. It is located on Interstate 5 about 2 miles south of downtown Cottage Grove. The community was named after the politician Milton S. Latham. The post office operated for about ten years, from September 16, 1878 to February 14, 1888. James J. Comstock was its first postmaster. Latham is now served by the Cottage Grove post office.
Document 14: Fridolin Arnault House: The Fridolin Arnault House is located in Wood-Ridge, Bergen County, New Jersey, United States. The house was added to the National Register of Historic Places on December 23, 2009. The Wood-Ridge Historical Society is headquartered in this house.
Document 15: Washington, D.C.: A new federal city was then constructed on the north bank of the Potomac, to the east of Georgetown. On September 9, 1791, the three commissioners overseeing the capital's construction named the city in honor of President Washington. The federal district was named Columbia, which was a poetic name for the United States commonly in use at that time. Congress held its first session in Washington on November 17, 1800.
ground_truth: Flemington
sub_queries: John Lambert >> place of death Answer: Lambertville
Lambertville >> located in the administrative territorial entity Answer: Hunterdon County
Hunterdon County >> contains administrative territorial entity Answer: Flemington