Question: West Ridge and the ridge that has IndependenceAvenue/Liberation Avenue as its eastern boundary are separated by what road? 

Context paragraphs:
Howard Street (Chicago): Howard Street, alternately known as Sibley Avenue in Park Ridge, is a major east-west street in the Chicago metropolitan area.  At Paulina Street, it houses the Howard CTA Station, the northern terminus of the Red Line, and, between Paulina Street and Kedzie Avenue, serves as the border between the city of Chicago (community areas of Rogers Park and West Ridge) and the city of Evanston.  It runs intermittently through several north and northwestern suburbs, near O'Hare International Airport, and finally terminates at Ridge Avenue in Elk Grove Village.  The street is located at 7600 N in Chicago's address system.

West Ridge, Chicago: West Ridge is one of 77 Chicago community areas.  It is a middle-class neighborhood located on the far North Side of the City of Chicago.  It is located in the 50th Ward and the 40th Ward.  Also historically called North Town, and frequently referred to as West Rogers Park, it is bordered on the north by Howard Street, on the east by Ridge Boulevard, Western Avenue, and Ravenswood Avenue, the south by Bryn Mawr Avenue and Peterson Avenue, and on the west by Kedzie Avenue and the North Shore channel of the Chicago River.  At one time joined with neighboring Rogers Park, it seceded to become its own village in 1890 over a conflict concerning park districts (known as the Cabbage War).  West Ridge was annexed to Chicago on April 4, 1893, along with Rogers Park.

North Ridge, Accra: North Ridge is a neighborhood in the city of Accra, Ghana bounded to the south by Castle Road.  The Kanda highway serves as the district's western boundary, while the Independence Avenue/Liberation Avenue is the eastern boundary.  The Ring road separates North Ridge from the northern district of Kanda.  The headquarters of the Bureau of National Investigations is located in North Ridge.  Originally planned as a neighborhood for civil servants and businessmen in the colonial era, North Ridge remains one of the better residential neighborhoods in Accra.

McClellan Gate: The McClellan Gate (sometimes known as the McClellan Arch) is a memorial to Major General George B. McClellan located inside Arlington National Cemetery in Arlington County, Virginia, in the United States.  Constructed about 1871 on Arlington Ridge Road (then the eastern boundary of the cemetery), it served as a main gate until about 1879 when the Sheridan Gate was constructed.  The McClellan Gate became nonfunctional in 1966 when the road closed, and expansion of the cemetery eastward in 1971 left the gate deep inside Arlington.  It is the only gate constructed on the cemetery's eastern boundary in the 1800s that survives.

West Ridge, Accra: West Ridge is a neighborhood of Accra, Ghana bounded to the south by Kinbu Gardens.  Barnes Road serves as the neighborhood's western boundary, while the Independence Avenue/Liberation Avenue is the eastern boundary.  Castle Road separates West Ridge from the northern neighborhood of North Ridge.  The Accra branch of the British Council is located in West Ridge off Liberia Road.

Anderson-Carlson Building: The Anderson-Carlson Building is a historic six-flat apartment building in the West Ridge community area of Chicago, Illinois.  George E. Carlson and F. Anderson commissioned the building, which was completed in 1928 and owned by Anderson's family for the first 27 years of its existence.  The building was designed by Godfrey E. Larson, a Chicago architect who later worked as a field representative for the Public Works Administration.  The apartment was built in the Spanish Baroque Revival style, which can be seen in the pilasters and swan's-neck pediment in its entryway and the two windows designed to resemble balconies.  While many six-flat apartments were constructed in West Ridge and neighboring Rogers Park in the 1920s, the Anderson-Carlson Building is the only one designed in the Spanish Baroque Revival style and one of the few with a highly detailed design.  The building has been largely unaltered since its construction; with the exception of one window, every major feature of the building is still present, and five of its six apartments have maintained their original design.  On November 15, 2003, the building was added to the National Register of Historic Places.

West Ridge Academy: West Ridge Academy (known as the Utah Boys Ranch until 2005), is a youth residential treatment center based in West Jordan, Utah, USA.  It seeks to provide clinical services, education, and other programs for teens, both girls and boys, that are identified as at risk.  Until 2005, the Utah Boys Ranch was male-only.  In early 2005, it opened new, separate facilities for girls and changed its name to West Ridge Academy.  It is a non-profit 501(c)(3) corporation under the name Children and Youth Services, Inc.  The academy states that it provides "quality clinical services, education, and experiences which promote spiritual awareness, personal accountability and change of heart."  In 2016, the application to transition West Ridge Academy into a charter school, named Eagle Summit Academy, was approved.

West Ridge, Arkansas: West Ridge is an unincorporated community in Mississippi County, Arkansas, United States.  West Ridge is located on Arkansas Highway 140 3.5 mi south-southwest of Etowah.  West Ridge has a post office with ZIP code 72391.

Park Ridge High School: Park Ridge High School is a six-year comprehensive community public high school with an integrated two-year middle school located in the borough of Park Ridge in Bergen County, New Jersey, United States, serving students in seventh through twelfth grades as the lone secondary school of the Park Ridge Public Schools.  The school is accredited by the New Jersey Department of Education.  The school is located on the corner of Park Avenue and Pascack Road in the center of Park Ridge.  The school is one of the three public schools in the town of Park Ridge, along with East Brook Elementary School and West Ridge Elementary School, which both serve grades K-6.

West Ridge, Illinois: West Ridge is an unincorporated community in Douglas County, Illinois, United States.  West Ridge is 3.5 mi northwest of Camargo.

Supporting paragraphs: West Ridge, Accra North Ridge, Accra
Answer: Castle Road