Question: In what part of the city where WSPO is located does Interstate 26 start?

full_context: Document 1: Philadelphia: Roosevelt Boulevard and the Roosevelt Expressway (U.S. 1) connect Northeast Philadelphia with Center City. Woodhaven Road (Route 63), built in 1966, and Cottman Avenue (Route 73) serve the neighborhoods of Northeast Philadelphia, running between Interstate 95 and the Roosevelt Boulevard (U.S. 1). The Fort Washington Expressway (Route 309) extends north from the city's northern border, serving Montgomery County and Bucks County. U.S. 30, extending east-west from West Philadelphia to Lancaster, is known as Lancaster Avenue throughout most of the city and through the adjacent Main Line suburbs.
Document 2: WSCI: WSCI (89.3 FM) is a noncommercial Classical/News/Talk in Charleston, South Carolina featuring both Classical music as well as news and other programs from NPR. The station is part of the statewide "Classical NPR network" from ETV Radio. There is only one locally produced program on this remotely fed station.
Document 3: WOSF: WOSF (105.3 FM) is an urban adult contemporary station licensed to Gaffney, South Carolina; serving the Charlotte, North Carolina market. WOSF is the Charlotte affiliate of the Tom Joyner Morning Show. Owned by Urban One, the station's studios are located in South Charlotte near Carowinds, and the transmitter site is located in Dallas, North Carolina. It is the only commercial station on the South Carolina side of the market that brands itself as a full-market Charlotte station; indeed, it is the only commercial station on the South Carolina side of the market that covers Charlotte to any significant extent.
Document 4: WCOS-FM: WCOS-FM is a Country music radio station licensed to Columbia, South Carolina and serves the Columbia, South Carolina market. The iHeartMedia, Inc. outlet is licensed by the Federal Communications Commission (FCC) to broadcast at 97.5 MHz with an effective radiated power (ERP) of 100,000 watts. The station goes by the name 975 WCOS and its current slogan is "Today's Best Country and Your All-Time Favorites." Its studios are in Columbia (west of the Congaree River) and the transmitter is north of the city.
Document 5: Arthur Ravenel Jr. Bridge: The Arthur Ravenel Jr. Bridge is a cable - stayed bridge over the Cooper River in South Carolina, USA, connecting downtown Charleston to Mount Pleasant. The eight lane bridge satisfied the capacity of U.S. Route 17 when it opened in 2005 to replace two obsolete cantilever truss bridges. The bridge has a main span of 1,546 feet (471 m), the third longest among cable - stayed bridges in the Western Hemisphere. It was built using the design - build method and was designed by Parsons Brinckerhoff.
Document 6: Charleston, South Carolina: Interstate 26 begins in downtown Charleston, with exits to the Septima Clark Expressway, the Arthur Ravenel, Jr. Bridge and Meeting Street. Heading northwest, it connects the city to North Charleston, the Charleston International Airport, Interstate 95, and Columbia. The Arthur Ravenel, Jr. Bridge and Septima Clark Expressway are part of U.S. Highway 17, which travels east-west through the cities of Charleston and Mount Pleasant. The Mark Clark Expressway, or Interstate 526, is the bypass around the city and begins and ends at U.S. Highway 17. U.S. Highway 52 is Meeting Street and its spur is East Bay Street, which becomes Morrison Drive after leaving the east side. This highway merges with King Street in the city's Neck area (industrial district). U.S. Highway 78 is King Street in the downtown area, eventually merging with Meeting Street.
Document 7: WSPG: WSPG (1400 AM) is a radio station licensed to Spartanburg, South Carolina. It is owned by Ryan Delaney, through licensee Fox Sports Spartanburg 2 LLC. The WSPG studios and transmitter are located at 340 Garner Road in Spartanburg.
Document 8: New Haven, Connecticut: The city also has several major surface arteries. U.S. Route 1 (Columbus Avenue, Union Avenue, Water Street, Forbes Avenue) runs in an east-west direction south of downtown serving Union Station and leading out of the city to Milford, West Haven, East Haven and Branford. The main road from downtown heading northwest is Whalley Avenue (partly signed as Route 10 and Route 63) leading to Westville and Woodbridge. Heading north towards Hamden, there are two major thoroughfares, Dixwell Avenue and Whitney Avenue. To the northeast are Middletown Avenue (Route 17), which leads to the Montowese section of North Haven, and Foxon Boulevard (Route 80), which leads to the Foxon section of East Haven and to the town of North Branford. To the west is Route 34, which leads to the city of Derby. Other major intracity arteries are Ella Grasso Boulevard (Route 10) west of downtown, and College Street, Temple Street, Church Street, Elm Street, and Grove Street in the downtown area.
Document 9: WSPA-FM: WSPA-FM is an adult contemporary radio station licensed to Spartanburg, South Carolina and serving the Upstate region, including Greenville and Spartanburg. The Entercom Communications outlet is licensed by the Federal Communications Commission (FCC) to broadcast at 98.9 MHz with an ERP of 100 kW. The station goes by the name "Magic 98.9" and its current slogan is '"Today's Lite Rock."
Document 10: Philadelphia: Interstate 95 runs through the city along the Delaware River as a main north-south artery known as the Delaware Expressway. The city is also served by the Schuylkill Expressway, a portion of Interstate 76 that runs along the Schuylkill River. It meets the Pennsylvania Turnpike at King of Prussia, Pennsylvania, providing access to Harrisburg, Pennsylvania and points west. Interstate 676, the Vine Street Expressway, was completed in 1991 after years of planning. A link between I-95 and I-76, it runs below street level through Center City, connecting to the Ben Franklin Bridge at its eastern end.
Document 11: Charleston, South Carolina: The City of Charleston is served by the Charleston International Airport. It is located in the City of North Charleston and is about 12 miles (20 km) northwest of downtown Charleston. It is the busiest passenger airport in South Carolina (IATA: CHS, ICAO: KCHS). The airport shares runways with the adjacent Charleston Air Force Base. Charleston Executive Airport is a smaller airport located in the John's Island section of the city of Charleston and is used by noncommercial aircraft. Both airports are owned and operated by the Charleston County Aviation Authority.
Document 12: Santa Monica, California: The Santa Monica Freeway (Interstate 10) begins in Santa Monica near the Pacific Ocean and heads east. The Santa Monica Freeway between Santa Monica and downtown Los Angeles has the distinction of being one of the busiest highways in all of North America. After traversing Los Angeles County, I-10 crosses seven more states, terminating at Jacksonville, Florida. In Santa Monica, there is a road sign designating this route as the Christopher Columbus Transcontinental Highway. State Route 2 (Santa Monica Boulevard) begins in Santa Monica, barely grazing State Route 1 at Lincoln Boulevard, and continues northeast across Los Angeles County, through the Angeles National Forest, crossing the San Gabriel Mountains as the Angeles Crest Highway, ending in Wrightwood. Santa Monica is also the western (Pacific) terminus of historic U.S. Route 66. Close to the eastern boundary of Santa Monica, Sepulveda Boulevard reaches from Long Beach at the south, to the northern end of the San Fernando Valley. Just east of Santa Monica is Interstate 405, the "San Diego Freeway", a major north-south route in Los Angeles County and Orange County, California.
Document 13: Summerville, South Carolina: U.S. Route 78 passes near the center of Summerville, leading southeast 24 miles (39 km) to downtown Charleston and northwest 29 miles (47 km) to Interstate 95 at St. George. Interstate 26 leads through the northeast corner of Summerville with access from Exit 199, leading southeast to Charleston and northwest 90 miles (140 km) to Columbia.
Document 14: WQNT: WQNT is an American AM radio station licensed by the Federal Communications Commission (FCC) to Kirkman Broadcasting, Inc. to broadcast on 1450 kHz serving the community of Charleston, South Carolina. The station's programming format is classic hits. The station's studios are located in the West Ashley portion of Charleston and the transmitter site is in Charleston.
Document 15: WSPO: WSPO (1390 AM) is an American radio station serving the Charleston, South Carolina, area. This station is under ownership of Saga Communications. Its studios are located in Charleston (east of the Cooper River) and the transmitter tower is in Charleston as well (west of the Ashley River).
ground_truth: downtown Charleston
sub_queries: What city is WSPO located? Answer: Charleston
Interstate 26 begins on what part of Charleston ? Answer: downtown Charleston