Question: What county is the birthplace of Philip W. Johnston located in?

full_context: Document 1: Boston: Federally, Boston is split between two congressional districts. The northern three-fourths of the city is in the 7th district, represented by Mike Capuano since 1998. The southern fourth is in the 8th district, represented by Stephen Lynch. Both are Democrats; a Republican has not represented a significant portion of Boston in over a century. The state's senior member of the United States Senate is Democrat Elizabeth Warren, first elected in 2012. The state's junior member of the United States Senate is Democrat Ed Markey, who was elected in 2013 to succeed John Kerry after Kerry's appointment and confirmation as the United States Secretary of State.
Document 2: Philip W. Johnston: Philip W. Johnston (July 21, 1944 in Chelsea, Massachusetts) is an American businessman, politician and former Secretary of Human Services in Massachusetts and Regional Administrator of Health and Human Services for New England.
Document 3: Philip Testerman: Philip Testerman (born January 12, 1927) was an American politician in the state of South Dakota. He was a member of the South Dakota State Senate and South Dakota House of Representatives. He was Assistant Minority Leader of the Senate from 1979 to 1980. Holding a high school education, he was a farmer and insurance agent.
Document 4: Massachusetts: Commonwealth of Massachusetts Flag Seal Nickname (s): The Bay State Motto (s): Ense petit placidam sub libertate quietem (Latin) By the sword we seek peace, but peace only under liberty State song (s): ``All Hail to Massachusetts ''Official language English Spoken languages English 77.4% Spanish 8.6% Portuguese 2.8% Chinese 2.1% Demonym Bay Stater (official) Massachusite (traditional) Massachusettsian Capital (and largest city) Boston Largest metro Greater Boston Area Ranked 44th Total 10,565 sq mi (27,336 km) Width 183 miles (295 km) Length 113 miles (182 km)% water 25.7 Latitude 41 ° 14 ′ N to 42 ° 53 ′ N Longitude 69 ° 56 ′ W to 73 ° 30 ′ W Population Ranked 15th Total 6,811,779 (2016 est.) Density 840 / sq mi (324 / km) Ranked 3rd (9) Median household income $67,861 (7th) Elevation Highest point Mount Greylock 3,489 ft (1063.4 m) Mean 500 ft (150 m) Lowest point Atlantic Ocean sea level Before statehood Province of Massachusetts Bay Admission to Union February 6, 1788 (6th) Governor Charlie Baker (R) Lieutenant Governor Karyn Polito (R) Legislature General Court Upper house Senate Lower house House of Representatives U.S. Senators Elizabeth Warren (D) Ed Markey (D) U.S. House delegation 9 Democrats (list) Time zone Eastern: UTC - 5 / - 4 ISO 3166 US - MA Abbreviations MA, Mass. Website www.mass.gov
Document 5: New Philharmonia Orchestra of Massachusetts: The motto of the orchestra is "Music for All". In that spirit, the orchestra conducts active outreach programs in the Boston public schools and has strong links to other local school systems and civic organizations. The 2007-2008 season concluded with a benefit concert at the Kennedy Library attended by the mayor of Boston, Thomas Menino, honoring the orchestra's partnership with John Hancock financial services. Under this partnership, members of the orchestra have been offering supplemental music education programs in the Oliver H. Perry elementary school in South Boston.
Document 6: Jay Livingstone: Jay Livingstone is an American politician who has served in the Massachusetts House of Representatives since July 2013. He is a resident of Back Bay, Boston, a member of the Democratic Party. He won a special election to succeed Martha M. Walz, unopposed in the June 25 general election after winning the May 28 primary. He was sworn in July 17, 2013. He has since won re-election in 2014, 2016, and 2018.
Document 7: Boston: Boston has an area of 89.6 square miles (232.1 km2)—48.4 square miles (125.4 km2) (54.0%) of land and 41.2 square miles (106.7 km2) (46.0%) of water. The city's official elevation, as measured at Logan International Airport, is 19 ft (5.8 m) above sea level. The highest point in Boston is Bellevue Hill at 330 feet (100 m) above sea level, and the lowest point is at sea level. Situated onshore of the Atlantic Ocean, Boston is the only state capital in the contiguous United States with an oceanic coastline.
Document 8: Boston: Boston is surrounded by the "Greater Boston" region and is contiguously bordered by the cities and towns of Winthrop, Revere, Chelsea, Everett, Somerville, Cambridge, Newton, Brookline, Needham, Dedham, Canton, Milton, and Quincy. The Charles River separates Boston from Watertown and the majority of Cambridge, and the mass of Boston from its own Charlestown neighborhood. To the east lie Boston Harbor and the Boston Harbor Islands National Recreation Area (which includes part of the city's territory, specifically Calf Island, Gallops Island, Great Brewster Island, Green Island, Little Brewster Island, Little Calf Island, Long Island, Lovells Island, Middle Brewster Island, Nixes Mate, Outer Brewster Island, Rainsford Island, Shag Rocks, Spectacle Island, The Graves, and Thompson Island). The Neponset River forms the boundary between Boston's southern neighborhoods and the city of Quincy and the town of Milton. The Mystic River separates Charlestown from Chelsea and Everett, and Chelsea Creek and Boston Harbor separate East Boston from Boston proper.
Document 9: Charles Manatt: Manatt was chairman of the Democratic National Committee from 1981 to 1985. In those years, he supervised and directed the 1984 Democratic National Convention. He was a delegate, sometimes categorized as a super delegate. He was the founder of the law firm Manatt, Phelps, and Phillips LLP, where his practice focused on international, administrative, and corporate law. He also served as ambassador to the Dominican Republic from 1999 to 2001. Manatt served until June 2008 as chairman of the board of trustees at the George Washington University. His widow is Kathleen K. Manatt.
Document 10: Philip H. Lilienthal: Philip H. Lilienthal (born 1940) is an American lawyer, camp director, and philanthropist best known for his humanitarian work in Ethiopia and South Africa.
Document 11: Boston: Boston is surrounded by the "Greater Boston" region and is contiguously bordered by the cities and towns of Winthrop, Revere, Chelsea, Everett, Somerville, Cambridge, Watertown, Newton, Brookline, Needham, Dedham, Canton, Milton, and Quincy. The Charles River separates Boston from Watertown and the majority of Cambridge, and the mass of Boston from its own Charlestown neighborhood. To the east lie Boston Harbor and the Boston Harbor Islands National Recreation Area (which includes part of the city's territory, specifically Calf Island, Gallops Island, Great Brewster Island, Green Island, Little Brewster Island, Little Calf Island, Long Island, Lovells Island, Middle Brewster Island, Nixes Mate, Outer Brewster Island, Rainsford Island, Shag Rocks, Spectacle Island, The Graves, and Thompson Island). The Neponset River forms the boundary between Boston's southern neighborhoods and the city of Quincy and the town of Milton. The Mystic River separates Charlestown from Chelsea and Everett, and Chelsea Creek and Boston Harbor separate East Boston from Downtown, the North End, and the Seaport.
Document 12: Chelsea, Massachusetts: Chelsea is a city in Suffolk County, Massachusetts, United States, directly across the Mystic River from the city of Boston. As of 2013, Chelsea had an estimated population of 36,828. It is also the second most densely populated city in Massachusetts behind Somerville. With a total area of just 2.21 square miles, Chelsea is the smallest city in Massachusetts in terms of total area.
Document 13: Medford, Massachusetts: 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.
Document 14: Geography of Massachusetts: Massachusetts is the 7th smallest state in the United States with an area of . It is bordered to the north by New Hampshire and Vermont, to the west by New York, to the south by Connecticut and Rhode Island, and to the east by the Atlantic Ocean. Massachusetts is the most populous New England state.
Document 15: Chelsea, Alabama: Chelsea is a city in Shelby County, Alabama, United States. It is part of the Birmingham metropolitan area. Chelsea was incorporated on March 1, 1996, with a population of 906. At the 2000 census the population was 2,949. According to the U.S. Census Bureau, the 2010 population for Chelsea was 10,183. Its seasonal campsite for visitors is Hargis Retreat which began in 1984. Chelsea is widely considered the fastest growing city in Shelby County, which is the fastest growing county in the state of Alabama.
ground_truth: Suffolk County
sub_queries: Philip W. Johnston >> place of birth Answer: Chelsea
Chelsea >> located in the administrative territorial entity Answer: Suffolk County