Question: Are Blue Grass Airport and Knox County Regional Airport both located in the state of Maine, United States?
Context: Matinicus Isle is an island plantation in Knox County, Maine, United States.  The island is located within Penobscot Bay about 20 miles east of the mainland coast and is accessible by ferry from Rockland or by air taxi from Knox County Regional Airport.  The plantation is both a year-round island community and a summer colony.  The population was 74 at the 2010 census. Blue Grass is an unincorporated community on VA 642 at its junction with VA 640 in Highland County, Virginia, United States.  Blue Grass lies along the South Branch Potomac River and is located approximately 6.1 mi north of Monterey, Virginia.  It was previously known as Crabbottom and Hulls Store before the Board on Geographic Names officially decided upon Blue Grass in 1950.  Near Blue Grass is the Devils Backbone rock formation.  Blue Grass has a post office with ZIP code 24413.  The Hollywood silent film classic "Tol'able David" was filmed in Blue Grass during 1921. North Haven is a town in Knox County, Maine, United States, in Penobscot Bay.  The town is both a year-round island community and a prominent summer colony.  The population was 355 at the 2010 census.  North Haven is accessed by three-times daily ferry service from Rockland, or by air taxi from Knox County Regional Airport. Blue Grass Airport (IATA: LEX, ICAO: KLEX, FAA LID: LEX) is a public airport in Fayette County, Kentucky, 4 miles west of downtown Lexington.  Located among world-renowned horse farms and situated directly across from Keeneland Race Course, Blue Grass Airport is the primary airport serving central and eastern Kentucky.  More than 1.2 million passengers depart or arrive annually at Blue Grass Airport.  In 2016, the airport served 1,245,251 passengers via four major airline carriers: Allegiant, American Airlines, Delta Air Lines and United Airlines. Penobscot Island Air is a small regional airline based at Knox County Regional Airport, Maine, United States (RKD) operating from a private terminal.  The airline operates scheduled service to the islands in Maine's Penobscot Bay, and offers private charter land and seaplane flights throughout the region. Vinalhaven is a town located on the larger of the two Fox Islands in Knox County, Maine, United States.  Vinalhaven is also used to refer to the Island itself.  The population was 1,165 at the 2010 census.  It is home to a thriving lobster fishery and hosts a summer colony.  Since there is no bridge to the island, Vinalhaven is accessible from Rockland via an approximately hour-and-fifteen-minute ferry ride across West Penobscot Bay, or by air taxi from Knox County Regional Airport. Raleigh Exec: The Raleigh Executive Jetport @ Sanford-Lee County or Raleigh Exec Jetport at Sanford-Lee CountyFAA Airport Master Record for TTA (Form 5010 ) (ICAO: KTTA, FAA LID: TTA) is a public use airport located seven nautical miles (8 mi, 13 km) northeast of the central business district of Sanford, a city in Lee County, North Carolina, United States.  It is owned by the Sanford-Lee County Regional Airport Authority and was previously known as Sanford-Lee County Regional Airport.  This airport is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a "reliever airport" for Raleigh-Durham International Airport. Knox County Regional Airport (IATA: RKD, ICAO: KRKD, FAA LID: RKD) is a county owned, public use airport in Knox County, Maine, United States.  It is located three nautical miles (6 km) south of the central business district of Rockland, Maine.  The airport serves the residents of midcoast Maine with commercial and charter aviation services.  Scheduled airline service is subsidized by the Essential Air Service program.  It is also a major hub of freight and mail service to Maine's island communities including Matinicus, North Haven and Vinalhaven. Owls Head is a town in Knox County, Maine, United States.  The population was 1,580 at the 2010 census.  A resort and fishing area, the community is home to the Knox County Regional Airport.  It includes the village of Ash Point. Downeast Airlines Flight 46 was a scheduled airline service in the United States from Boston's Logan International Airport to Rockland, Maine operated by Downeast Airlines.  On May 30, 1979 a de Havilland Canada DHC-6 Twin Otter operating the flight crashed during a nonprecision approach to Rockland's Knox County Regional Airport.  The cause of the accident was controlled flight into terrain (CFIT) after the failure of the flightcrew to stop the aircraft's descent below the minimum descent altitude for the nonprecision approach at Knox County airport.  The investigation into the accident looked into the airline's corporate culture as a contributing factor to the crash; this was the first time an investigation took this approach to an air crash.
Answer: no