Question: In what borough is the High Elms Manor School located?

Context paragraphs:
Kings Manor Community College: Kings Manor Community College (formerly Kings Manor School) was a secondary school located in Shoreham-by-Sea, West Sussex.  A specialist status state school, Kings Manor closed and reopened as an Academy named Shoreham Academy, with funding from the central government, in September 2009.

Plumstead Manor School: Plumstead Manor School is a secondary school and sixth form for girls, located next to Plumstead Common in the Plumstead area of the Royal Borough of Greenwich in London, England.  It is a community school controlled by Greenwich London Borough Council.

Ash Manor School: Ash Manor School is a comprehensive, community secondary school located in Manor Road, Ash, Surrey, England.  Opened as Yeoman's Bridge School in 1948.  The school was formed after a merger between two schools Yeomans Bridge and Robert Haining in 1986.  Many children are educated here, holding 937 students.

Garston, Hertfordshire: Garston is a village in Hertfordshire, England.  Garston is contiguous with Watford and now, despite retaining a local identity, is effectively a suburb.  It is within the Stanborough, Woodside and Meriden wards of the borough of Watford, although a small number of its streets are in Hertsmere.

Penn Manor High School: Penn Manor High School is a large, rural/suburban, public secondary school located in Millersville, Pennsylvania, United States.  It is the sole high school operated by the Penn Manor School District.  In 2013, enrollment was reported as 1,589 pupils in 9th through 12th grades, with 27% eligible for free lunches due to family poverty.  Additionally, 17% received special education services, while 9.3% were identified as gifted.  The school employed 112 teachers.  Per the PA Department of Education, 3% of the teachers were rated "non‐highly qualified" under the federal No Child Left Behind Act.

Penn Manor School District: The Penn Manor School District is a large, rural/suburban, public school district located in southern in Lancaster County, Pennsylvania.  The Penn Manor School District encompasses approximately 110 square miles. Penn Manor School District serves residents of: Manor Township, Conestoga Township, Millersville Borough, Martic Township and Pequea Township.  According to 2000 federal census data, it serves a resident population of 37,942.  By 2010, the district's population was 41,376 people.  In 2009, Penn Manor School District residents' per capita income was $20,529 and the median family income was $55,708.  The educational attainment levels for the Penn Manor School District population (25 years old and over) were 88.7% high school graduates and 25% college graduates.

Downe Bank: Downe Bank is a nature reserve owned and managed by the Kent Wildlife Trust in the North Downs, close to Downe in the London Borough of Bromley.  It is a Site of Special Scientific Interest (SSSI) together with the neighbouring High Elms Country Park.  Located close to Charles Darwin's home, Down House, it was one of his favourite places and helped to inspire his work.

High Elms Manor School: High Elms Manor School, formerly St Andrews Montessori, is a Montessory method primary school in Garston, Hertfordshire, England.  It is situated at High Elms Manor (Garston Manor), near Parmiter's School and St. Michael's Catholic High School.

Langhorne Manor School: Langhorne Manor School, now known as Langhorne Manor Borough Hall, is a historic one-room school building located at Langhorne Manor, Bucks County, Pennsylvania.  It was built in 1891, and is a small 1 1/2-story building with stone faced wood frame walls and a slate covered hipped roof in the Queen Anne style.  It measures 33 feet wide by 43 feet deep.  The roof features two eyelid dormers and a gable dormer with fishscale shingles.  The school was converted to Borough Hall in 1959.

High Elms Manor: High Elms Manor is a grade II listed Georgian country house located near Garston in Hertfordshire, England.  It was built in around 1812, and was originally known as "High Elms", but from the 1890s to 2010 it was called Garston Manor.

Supporting paragraphs: High Elms Manor School Garston, Hertfordshire
Answer: Watford