Question: What county in Montana was home to St. Benedict's Catholic School?

Context paragraphs:
St. Benedict's College, Colombo: St. Benedict's College (Sinhala: සාන්ත බෙනඩික් විදුහල, Tamil: புனித பெனடிக்ட் கல்லூரி) is a Catholic school located in Kotahena area of Colombo, Sri Lanka.  This school was founded in 1865 and is managed by De La Salle Brothers.  The school is considered as one of the leading schools in Sri Lanka and also the oldest catholic schools in the island, with a history of over 150 years.

St. Peter's Catholic Secondary School: S. Peter's Catholic Secondary School is located in Barrie, Ontario, Canada.  It is a member of the Simcoe Musoka Catholic District School Board.  The school is informally referred to as St. Pete's or St. Peter's.  St. peters was founded in 1996 and had an addition built on the west side of the school in 2010-2011 which consisted of six new classrooms, a new dance studio and fitness room, and a new student success center to accommodate the growing number of students.  St. Peters also has a daycare/preschool attached to it.  Six feeder schools contribute to the high school’s population each year, these include but are not limited to: Holy Cross Catholic School, St. Francis of Assisi Catholic School, Saint Gabriel the Archangel Catholic School, St. John Paul II Catholic School, St John Vianney Catholic School, and St. Michael the Archangel Catholic School.  The school’s population is approximately 1200 students

Roundup, Montana: Roundup is a city in and the county seat of Musselshell County, Montana, United States.  The population was 1,788 during the 2010 census.

St. Benedict High School (Chicago, Illinois): St. Benedict Preparatory High School is a private, Roman Catholic high school in Chicago, Illinois.  It is located in the Roman Catholic Archdiocese of Chicago.  St. Benedict Preparatory High School is located on the North Side of Chicago at Irving Park Road and Leavitt St.

St. Benedict the Moor School: St. Benedict the Moor School, located at 86 Martin Luther King Avenue in the Lincolnville National Historic District of St. Augustine, Florida was an all black Catholic school built in 1898.  The money for construction of the school ($7,500) was donated by Katherine Drexel (1858–1955), a nun of the Sisters of the Blessed Sacrament, an order founded “"to serve Indians and Colored People."”  Drexel a member of the wealthy Philadelphia, Pennsylvania banking family was the niece of Anthony J. Drexel founder of Drexel University.  Katherine Drexel was made a Catholic saint by Pope John Paul II in 2000.

Monastery of St. Benedict (Norcia): The Benedictine Monks of Norcia (Italian: "Monastero di San Benedetto di Norcia") are members of the Order of St. Benedict and are located in Nursia, Italy, in the extreme southeast tip of Umbria beneath the slopes of the Sibylline mountains.  The current monastery is physically located above the 5th century ruins of the house of St. Benedict and his twin sister St. Scholastica, and has been the location of monastic communities since the tenth century AD.  The Basilica of St. Benedict was located on the traditional birthplace of St. Benedict and St. Scholastica.  Today the Monks of Norcia care for the spiritual, pastoral, and temporal needs of approximately 50,000 pilgrims from around the world who annually visit the birthplace of Sts.  Benedict and Scholastica.

St. Benedict's Catholic School: St. Benedict's Catholic School is a historic school building located at 524 1st Street West in Roundup, Montana.  The school was built in 1920-21 to serve the children of Roundup's Catholic immigrant community.  Coal production, an oil boom, and homesteading all drove economic and population growth in Roundup during the 1910s, and many of the city's new residents were European immigrants.  The city's newly established Catholic community built the school toward the end of Roundup's building boom.  Architect John H. Grant, who served as the city's only resident architect, designed the two-story brick building.  Various groups of nuns served as the school's teachers, with different orders replacing the previous one every few years; when a new order could not be found to replace a departing order in 1950, the school closed for good.

Benedictine College: Benedictine College is a co-educational university in Atchison, Kansas, United States, founded in 1971 by the merger of St. Benedict's College (founded 1858) for men and Mount St. Scholastica College (founded 1923) for women.  It is a Roman Catholic, Benedictine, liberal arts, and residential college located on bluffs overlooking the Missouri River, northwest of Kansas City, Missouri.  Benedictine is one of a number of U.S. Benedictine colleges, and is sponsored by St. Benedict's Abbey and Mount St. Scholastica Monastery.  The abbey has a current population of 53 monks, while the Mount monastery numbers 147 community members.  The college has built its core values around four "pillars"—Catholic, Benedictine, Liberal Arts, Residential—which support the Benedictine College mission to educate men and women in a community of faith and scholarship.  It is endorsed by "The Newman Guide to Choosing a Catholic College".

Church of St. Benedict the Moor (Pittsburgh): Church of St. Benedict the Moor, built in 1894, is a Roman Catholic church located at 89 Crawford Street in the Hill District neighborhood of Pittsburgh, Pennsylvania.  In the 1960s, four predominantly African-American parishes were merged and consolidated at St. Benedict's.  The 18-foot tall statue of St. Benedict the Moor by Frederick Charles Shrady was installed atop its tower in 1968.

St. Benedict's Church (Stamford, Connecticut): Saint Benedict - Our Lady of Montserrat, or simply St. Benedict's Church, is a Catholic church in Stamford, Connecticut, in the Diocese of Bridgeport.  The historic brick Neo-Tudor church at 1A St. Benedict's Circle was built in 1930 and added to the National Register of Historic Places in 1987.  The architect was Henry F. Ludorf of Hartford, Connecticut.  The exterior uses a variety of building materials, including brick, ashlar stone, timbering, and stucco.  The church's main facade is asymmetrically arranged with its entrance on the left, under a handsome timber-frame porch, and a stone tower to the right which is topped by a bellpot roof.

Supporting paragraphs: St. Benedict's Catholic School Roundup, Montana
Answer: Musselshell County