Question: In which county the Nashua High School is situated?

Context paragraphs:
Bedford High School (New Hampshire): Bedford High School is a public high school in the town of Bedford, New Hampshire, United States.  The high school adjoins the town's Ross A. Lurgio Middle School (7th and 8th grades).  The combined schools are situated on a 40 acre campus at 47 Nashua Road.  The two schools share an 810-seat theatre, a 2000-seat gymnasium, a FieldTurf football field and a synthetic 400-meter track.  The approximate cost for constructing this facility in combination with Lurgio was $50 million.

Mike Welch (baseball): Michael Paul Welch (born August 25, 1972) is a former right-handed pitcher in Major League Baseball, born in Haverhill, Massachusetts.  Welch grew up in Nashua, NH and went to Nashua High School.  Welch attended the University of Southern Maine where he participated in playing college baseball.  During his time there, in 1991 he helped lead Southern Maine to winning a National Championship.  Welch was later drafted in the 3rd round of the 1993 draft by the New York Mets.  Mike Welch had a successful minor league career, making the AA All-Star team while playing for the Binghamton Mets.  In 1993, while Welch was playing for the Pittsfield Mets, he was awarded the relief pitcher of the year award.  Welch was later on traded to the Philadelphia Phillies, where he started his Major League career.  Welch holds the world record for most strikeouts recorded in a American Legion game, racking up 20 strikeouts in the Northeast American Legion Regional Tournament.

DuVal High School: DuVal High School (DHS), is a comprehensive public four-year high school in Prince George's County, Maryland.  DuVal High School opened in 1960 to relieve overcrowding from other local area high schools.  The original building was a one-story, 38-classroom school situated in the formerly small village of Good Luck, Maryland.  The historic primary school serving the same community (the "Good Luck Schoolhouse" or "Glen Dale Colored School") was built in 1899, expanded in 1915 but abandoned circa 1935, and became a private residence in 1938.  In 1980, the village was split into the census-designated places of Goddard, Maryland and Glenn Dale, Maryland.  Thus, the high school's first mailing address was simply; Glenn Dale and Telegraph Roads, Glenn Dale, MD.  The current address is; 9880 Good Luck Road in the unincorporated town of Lanham, Maryland, 20706.  Mark Covington has served as the Principal since 2014.

Kole Ayi: Bamikole Richard Ayi (born September 27, 1978) is a former American football linebacker who played two seasons in the National Football League with the New England Patriots and St. Louis Rams.  Ayi played college football at the University of Massachusetts and attended Nashua High School in Nashua, New Hampshire.  He was a member of the new England Patriots team that won Super Bowl XXXVI.

Nashua, New Hampshire: Nashua is a city in Hillsborough County, New Hampshire, United States.  As of the 2010 census, Nashua had a total population of 86,494, making it the second-largest city in the state (and in the three northern New England states) after Manchester.  As of 2016 the population had risen to an estimated 87,882.

Nashua High School: Nashua High School may refer to a school in Nashua, New Hampshire:

Hilo High School: Hilo High School is a public, co-educational high school of the Hawaii State Department of Education, and serves grades nine through twelve.  Established in 1906, its first class graduated in 1909.  Hilo High School is near the Wailuku River in Hawaii County on the Big Island of Hawaii.  The campus boasts the black marble terrazzo and gray gravel sculpture "Matrix" by Ken Shutt in the middle of its two patios in its courtyard.  The school is situated at 556 Waianuenue Avenue on across the street from Hilo Intermediate School, one of its two feeder schools, the other being Kalanianaole Intermediate School.  Hilo's symbol and mascot is the Viking and its school colors are blue and gold.  Hilo High School celebrated its centennial during Homecoming of 2006.  Hilo High School's crosstown rivals are the Warriors of Waiakea High School.

Coconut Creek High School: Coconut Creek High School is a high school located in Coconut Creek, Florida, which teaches grades 9–12.  Coconut Creek High serves Coconut Creek, and parts of Margate, North Lauderdale, and Pompano Beach.  The school is a part of the Broward County School District.  It opened in 1970 and subsequently became notable in music, cross-country, and baseball.  Coconut Creek High School is located on Coconut Creek Parkway, approximately one mile west of the Florida Turnpike.  The City of Coconut Creek is located in the northwest section of Broward County.  The school is situated on 40 acres of well-landscaped property.  An "L"-shaped lake is located on the southeast end of the school grounds contributing to the aesthetic setting.

Nashua High School South: Nashua High School South, formerly Nashua High School, is a public high school located in Nashua, New Hampshire.  The school's current location was erected in 1975 with its first class graduating in June 1976.  The school was remodeled between 2002 and 2004 when a second school, Nashua High School North, was built.  The existing high school building was renamed Nashua High School South.  The school serves approximately 2200 students, making it the largest public high school in New Hampshire, and the second largest high school overall, after the private Pinkerton Academy.

Nashua High School North: Nashua High School North is a public high school located in Nashua, New Hampshire.  The school's current location was erected in 2002 with its first class graduating in June 2005, one year after the city's high schools officially split into two locations and establishments (with the earlier high school now being renamed Nashua High School South).  Generally, students living north of the Nashua River attend "North", as it is commonly referred to.  However students from either school can take certain classes at the other school and be bused over.  The school's mascot is the Titans.

Supporting paragraphs: Kole Ayi Nashua, New Hampshire
Answer: Hillsborough County