Question: What county are Elmont, New York and Hempstead, New York located in?

Context paragraphs:
Muscoot Reservoir: The Muscoot Reservoir is a reservoir in northern Westchester County, New York located directly north of the village of Katonah.  Part of the New York City Watershed System, it is 25 miles (40 kilometres) north of the City, which it supplies with drinking water.  It was constructed at the beginning of the 19th century by impounding the Muscoot River, a tributary of the Croton River in turn is a tributary of the Hudson River.

Elmont, New York: Elmont is an unincorporated community and census-designated place (CDP) located in northwestern Hempstead in Nassau County, New York, United States, along its border with the borough of Queens in New York City.  It is a suburban bedroom community located on Long Island.  The population was 33,198 at the 2010 census.

Herbert H. Franklin: Herbert Henry Franklin (September 1, 1866 – July 7, 1956) was an American automobile magnate, businessman and industrialist, Franklin was born in Lisle, New York located in Broome County in Southern New York State.

New City, New York: New City is a hamlet and census-designated place in the town of Clarkstown, Rockland County, New York, United States, part of the New York Metropolitan Area.  An affluent suburb of New York City, the hamlet is located 18 mi north of the city at its closest point, Riverdale, Bronx.  Within Rockland County, New City is located north of Bardonia, northeast of Nanuet, east of New Square and New Hempstead, south of Garnerville and Haverstraw village, and west, straight across Lake DeForest, of Congers.  New City's population was 33,559 at the 2010 census, making it the 14th most populous CDP/hamlet in the state of New York.

State and National Law School: State and National Law School was an early practical training law school founded in 1849 by John W. Fowler in Ballston Spa, New York located in Saratoga County.  It was also known as New York State and National Law School, Ballston Law School, and Fowler's State and National Law School.  In 1853 the school relocated to Poughkeepsie in Dutchess County, New York.  The school closed its doors sometime in the 1860s.

Garden City, New York: Garden City is an incorporated village in the town of Hempstead, in central Nassau County, New York, in the United States.  It was founded by multi-millionaire Alexander Turney Stewart in 1869, and is on Long Island, to the east of New York City, 18.5 miles (29.8 km) from midtown Manhattan.  The village is located mostly in the Town of Hempstead with a small portion in the Town of North Hempstead.

Mohawk Valley Community College: Mohawk Valley Community College is a two-year college of the State University of New York located in Oneida County, New York in the United States.  The college has campuses in Rome and Utica.

Hempstead Lake State Park: Hempstead Lake State Park is a 737 acre state park located in Nassau County, New York in the United States.  The park is located in West Hempstead and is one of three state parks within the Town of Hempstead.  There is a quick-access entrance at exit 18 from the Southern State Parkway.  The park contains the largest freshwater lake in Nassau County.

H. Frank Carey Junior-Senior High School: H. Frank Carey High School is a public high school located in Franklin Square, New York serving students in the seventh through twelfth grades from the towns of Franklin Square, Garden City South, West Hempstead, and Elmont.  The school's principal was Valerie Angelillo up until the 2016-2017 school year, when she was replaced by Christopher Fiore.

Hempstead, New York: Hempstead is one of the three towns in Nassau County, New York, United States, occupying the southwestern part of the county, in the western half of Long Island.  Twenty-two incorporated villages are completely or partially within the town.  Hempstead's combined population was 759,757 at the 2010 Census, the majority of the population of the county and by far the most of any town in New York.  Also, a village named Hempstead is within the Town.

Supporting paragraphs: Elmont, New York Hempstead, New York
Answer: Nassau County