Question: What county shares a border with the county in which Kathleen Teahan was born?

full_context: Document 1: Kathleen L. Martin: Kathleen L. Martin was commissioned an Ensign in May 1973 after graduating from Boston University. Following Officer Indoctrination School in Newport, R.I., she served at Naval Hospital, Camp Lejeune, North Carolina, as a staff nurse and later as a charge nurse in pediatrics. In 1976, she reported to Navy Recruiting District, Philadelphia, as the Medical Programs Officer.
Document 2: Santa Monica, California: The Santa Monica Freeway (Interstate 10) begins in Santa Monica near the Pacific Ocean and heads east. The Santa Monica Freeway between Santa Monica and downtown Los Angeles has the distinction of being one of the busiest highways in all of North America. After traversing Los Angeles County, I-10 crosses seven more states, terminating at Jacksonville, Florida. In Santa Monica, there is a road sign designating this route as the Christopher Columbus Transcontinental Highway. State Route 2 (Santa Monica Boulevard) begins in Santa Monica, barely grazing State Route 1 at Lincoln Boulevard, and continues northeast across Los Angeles County, through the Angeles National Forest, crossing the San Gabriel Mountains as the Angeles Crest Highway, ending in Wrightwood. Santa Monica is also the western (Pacific) terminus of historic U.S. Route 66. Close to the eastern boundary of Santa Monica, Sepulveda Boulevard reaches from Long Beach at the south, to the northern end of the San Fernando Valley. Just east of Santa Monica is Interstate 405, the "San Diego Freeway", a major north-south route in Los Angeles County and Orange County, California.
Document 3: Charleston, South Carolina: Interstate 26 begins in downtown Charleston, with exits to the Septima Clark Expressway, the Arthur Ravenel, Jr. Bridge and Meeting Street. Heading northwest, it connects the city to North Charleston, the Charleston International Airport, Interstate 95, and Columbia. The Arthur Ravenel, Jr. Bridge and Septima Clark Expressway are part of U.S. Highway 17, which travels east-west through the cities of Charleston and Mount Pleasant. The Mark Clark Expressway, or Interstate 526, is the bypass around the city and begins and ends at U.S. Highway 17. U.S. Highway 52 is Meeting Street and its spur is East Bay Street, which becomes Morrison Drive after leaving the east side. This highway merges with King Street in the city's Neck area (industrial district). U.S. Highway 78 is King Street in the downtown area, eventually merging with Meeting Street.
Document 4: Brockton, Massachusetts: Brockton is a city in Plymouth County, Massachusetts, United States; the population was 95,314 in the 2015 Census. Brockton, along with Plymouth, are the county seats of Plymouth County. Brockton is the seventh largest city in Massachusetts and is sometimes referred to as the "City of Champions", due to the success of native boxers Rocky Marciano and Marvin Hagler, as well as its successful Brockton High School sports programs. Two of the villages within the city are Montello and Campello, both have the distinction of having their own MBTA Commuter Rail Stations and post offices. Campello is the smallest neighborhood in the city, but also the most populous. Brockton hosts a baseball team, the Brockton Rox. Brockton is one of the windiest cities in the United States, with an average wind speed of 14.3 mph.
Document 5: Brockton High School: Brockton High School, established in 1870, is a high school located in Brockton, Massachusetts. It is a part of Brockton Public Schools. As of 2016 Brockton High School, with 4,250 students, is one of the largest high schools in the United States and the largest high school in Massachusetts. Although widely stated by locals to be the largest high school East of the Mississippi River, it is in fact false, as this title is currently held by Brooklyn Technical High School in New York City. Brockton High School's colors are Black & Red and their mascot is the Boxers, which is a reference to the storied boxing history of the city, and also a tribute to hall - of - fame boxers Rocky Marciano and Marvin Hagler, who are both from Brockton and alumni of Brockton High School.
Document 6: Kathleen Teahan: Kathleen M. Teahan (born June 11, 1947 in Brockton, Massachusetts) is an American teacher and politician. She represented the 7th Plymouth District in the Massachusetts House of Representatives from 1997–2007. She resides in Whitman.
Document 7: Plymouth: The A38 dual-carriageway runs from east to west across the north of the city. Within the city it is designated as 'The Parkway' and represents the boundary between the urban parts of the city and the generally more recent suburban areas. Heading east, it connects Plymouth to the M5 motorway about 40 miles (65 km) away near Exeter; and heading west it connects Cornwall and Devon via the Tamar Bridge. Regular bus services are provided by Plymouth Citybus, First South West and Target Travel. There are three Park and ride services located at Milehouse, Coypool (Plympton) and George Junction (Plymouth City Airport), which are operated by First South West.
Document 8: St. John's, Newfoundland and Labrador: St. John's is the eastern terminus of the Trans-Canada Highway, one of the longest national highways in the world. The divided highway, also known as "Outer Ring Road" in the city, runs just outside the main part of the city, with exits to Pitts Memorial Drive, Topsail Road, Team Gushue Highway, Thorburn Road, Allandale Road, Portugal Cove Road and Torbay Road, providing relatively easy access to neighbourhoods served by those streets. Pitts Memorial Drive runs from Conception Bay South, through the city of Mount Pearl and into downtown St. John's, with interchanges for Goulds, Water Street and Hamilton Avenue-New Gower Street.
Document 9: Kay Khan: Kay Khan is an American state legislator serving in the Massachusetts House of Representatives. She has represented Newton in the Massachusetts House of Representatives since 1995. She was originally appointed by Speaker Robert DeLeo in 2009 to serve as the House Chair of the Joint Committee on Children, Families, and Persons with Disabilities, and has served in this capacity ever since.
Document 10: Detroit: Detroit is one of 12 American metropolitan areas that are home to professional teams representing the four major sports in North America. All these teams but one play within the city of Detroit itself (the NBA's Detroit Pistons play in suburban Auburn Hills at The Palace of Auburn Hills). There are three active major sports venues within the city: Comerica Park (home of the Major League Baseball team Detroit Tigers), Ford Field (home of the NFL's Detroit Lions), and Joe Louis Arena (home of the NHL's Detroit Red Wings). A 1996 marketing campaign promoted the nickname "Hockeytown".
Document 11: Therese Murray: Therese Murray (born October 10, 1947 in Boston) is an American politician who served as President of the Massachusetts Senate from 2007 to 2015. Murray, a Democrat, was the first woman to lead a house of the Massachusetts General Court. She represented the Plymouth and Barnstable district in the Massachusetts Senate from 1993 to 2015.
Document 12: Massachusetts Route 25: Route 25 is a numbered state highway located in Plymouth County and Barnstable County, Massachusetts, United States. The route is a nominally east–west freeway for its entire length, and less commonly known as the Blue Star Memorial Highway. An eastward continuation of Interstate 495, Route 25 provides freeway access to Cape Cod. The route's western terminus is at a trumpet interchange with I-495 and I-195 in Wareham. The route has three numbered interchanges along its length before terminating at the northern end of the Bourne Bridge in Bourne; the mainline of Route 25 continues across the bridge and over the Cape Cod Canal as Massachusetts Route 28 south.
Document 13: Plymouth North High School: Plymouth North High School, known informally as Plymouth North or PNHS, is a public high school located in Plymouth, Massachusetts. Its students are residents of the town of Plymouth. The school is one of two high schools in Plymouth, the other being Plymouth South High School. Plymouth North is located south of Plymouth Center, and is located adjacent to the Plymouth County Courthouse, the Plymouth County Registry of Deeds, and Beth Israel Deaconess Hospital. The school colors are Navy Blue, White & Silver and the school mascot is an Eagle.
Document 14: Boston: Nicknamed "The Walking City", Boston hosts more pedestrian commuters than do other comparably populated cities. Owing to factors such as the compactness of the city and large student population, 13 percent of the population commutes by foot, making it the highest percentage of pedestrian commuters in the country out of the major American cities. In 2011, Walk Score ranked Boston the third most walkable city in the United States. As of 2015[update], Walk Score still ranks Boston as the third most walkable US city, with a Walk Score of 80, a Transit Score of 75, and a Bike Score of 70.
Document 15: Kevin Honan: Kevin G. Honan is an American state legislator serving in the Massachusetts House of Representatives. He is a Brighton resident and a member of the Democratic Party.
ground_truth: Barnstable County
sub_queries: Kathleen Teahan >> place of birth Answer: Brockton
Brockton >> located in the administrative territorial entity Answer: Plymouth County
Plymouth County >> shares border with Answer: Barnstable County