Question: Which county shares a border with the county where Jackson is located?

full_context: Document 1: Jackson Township, Pike County, Ohio: Jackson Township is one of the fourteen townships of Pike County, Ohio, United States. The 2000 census found 1,346 people in the township.
Document 2: Westford, Richland County, Wisconsin: Westford is a town in Richland County, Wisconsin, United States. The population was 594 at the 2000 census. The unincorporated communities of Bunker Hill and Germantown are located in the town. The unincorporated community of Corwin was also located in the town.
Document 3: Richfield, Washington County, Wisconsin: Richfield is a village in Washington County, Wisconsin, United States. The population was 11,300 at the 2010 census. The unincorporated communities of Colgate and Hubertus are located partially in Richfield.
Document 4: Jackson Township, Parke County, Indiana: Jackson Township is one of thirteen townships in Parke County, Indiana, United States. As of the 2010 census, its population was 737 and it contained 475 housing units.
Document 5: Grant County, Wisconsin: Grant County comprises the Platteville, WI Micropolitan Statistical Area. It is in the tri-state area of Illinois, Iowa, and Wisconsin, and is crossed by travelers commuting to Madison from a number of eastern Iowan cities, and by residents of northern Illinois traveling to the Twin Cities or La Crosse, Wisconsin.
Document 6: Jackson Township, Brown County, Ohio: Jackson Township is one of the sixteen townships of Brown County, Ohio, United States. The 2010 census found 1,581 people in the township.
Document 7: Wayne, Washington County, Wisconsin: Wayne is a town in Washington County, Wisconsin, United States. The population was 1,727 at the 2000 census. The unincorporated communities of Kohlsville and Wayne are located in the town.
Document 8: Jackson (village), Wisconsin: Jackson is a village in Washington County, Wisconsin, United States. The population was 6,753 at the 2010 census. The village is adjacent to the Town of Jackson.
Document 9: Colgate, Wisconsin: Colgate is an unincorporated community in Washington County, Wisconsin, United States, straddling the county line with Waukesha County. Colgate is located partially in the village of Richfield, and the town of Lisbon. Its ZIP code is 53017.
Document 10: Jackson Township, Clinton County, Indiana: Jackson Township is one of fourteen townships in Clinton County, Indiana. As of the 2010 census, its population was 1,173 and it contained 469 housing units. The township was named for President Andrew Jackson.
Document 11: Plat, Wisconsin: Plat was an unincorporated community and is now a neighborhood in the village of Richfield, Washington County, Wisconsin, United States. It is located at the intersection of Plat Road and Monches Road. It is 2 miles from the towns of Erin and Merton and from County Trunk Highway Q (County Line Road) and the Waukesha County and Washington County division.
Document 12: Polk, Wisconsin: Polk is a town in Washington County, Wisconsin, United States. The population was 3,938 at the 2000 census. The unincorporated communities of Ackerville, Cedar Creek, Cedar Lake, Diefenbach Corners, Mayfield, and Rugby Junction are located in the town. The town derives its name from James K. Polk, 11th U.S. President, who was in office when Wisconsin attained statehood in 1848.
Document 13: Jackson Township, Dearborn County, Indiana: Jackson Township is one of fourteen townships in Dearborn County, Indiana. As of the 2010 census, its population was 1,705 and it contained 624 housing units.
Document 14: Jackson Township, Clermont County, Ohio: Jackson Township is one of the fourteen townships of Clermont County, Ohio, United States. As of the 2010 census the population was 2,980.
Document 15: Madison Township, Jackson County, Ohio: Madison Township is one of the twelve townships of Jackson County, Ohio, United States. As of the 2010 census, 2,188 people lived in the township, including 1,549 in its unincorporated areas.
ground_truth: Waukesha County
sub_queries: Jackson >> located in the administrative territorial entity Answer: Washington County
Washington County >> shares border with Answer: Waukesha County