Question: cable cars started operations in the main city served by KFRC-FM when?

full_context: Document 1: San Diego: San Diego is served by the San Diego Trolley light rail system, by the SDMTS bus system, and by Coaster and Amtrak Pacific Surfliner commuter rail; northern San Diego county is also served by the Sprinter light rail line. The Trolley primarily serves downtown and surrounding urban communities, Mission Valley, east county, and coastal south bay. A planned Mid-Coast extension of the Trolley will operate from Old Town to University City and the University of California, San Diego along the I-5 Freeway, with planned operation by 2018. The Amtrak and Coaster trains currently run along the coastline and connect San Diego with Los Angeles, Orange County, Riverside, San Bernardino, and Ventura via Metrolink and the Pacific Surfliner. There are two Amtrak stations in San Diego, in Old Town and the Santa Fe Depot downtown. San Diego transit information about public transportation and commuting is available on the Web and by dialing "511" from any phone in the area.
Document 2: Fisherman's Wharf, San Francisco: Fisherman's Wharf is a neighborhood and popular tourist attraction in San Francisco, California. It roughly encompasses the northern waterfront area of San Francisco from Ghirardelli Square or Van Ness Avenue east to Pier 35 or Kearny Street. The F Market streetcar runs through the area, the Powell-Hyde cable car lines runs to Aquatic Park, at the edge of Fisherman's Wharf, and the Powell-Mason cable car line runs a few blocks away.
Document 3: San Francisco cable car system: San Francisco cable car system Cable car on Powell Street Overview Owner San Francisco Municipal Transportation Agency Area served Chinatown, Financial District, Fisherman's Wharf, Nob Hill, Russian Hill, Union Square Locale San Francisco Transit type Cable car Number of lines Line number 59 Powell - Mason 60 Powell - Hyde 61 California St. Number of stations 62 Daily ridership 20,100 (2014) Annual ridership 7,409,400 (2014) Headquarters San Francisco Cable Car Museum Website sfmta.com Operation Began operation California St. line: 1878 Powell - Mason line: 1888 Powell - Hyde line: 1957 Operator (s) San Francisco Municipal Railway Reporting marks MUNI Character Street running with some reserved right - of - ways Number of vehicles California St. line: 12 double - ended cars Powell - Mason / Hyde lines: 28 single - ended cars Train length 1 grip car Technical System length California St. line: 1.4 mi (2.3 km) Powell - Mason line: 1.6 mi (2.6 km) Powell - Hyde line: 2.1 mi (3.4 km) No. of tracks Track gauge 3 ft 6 in (1,067 mm) Top speed 9.5 mph (15.3 km / h) hide System map
Document 4: KSJO: KSJO is a commercial radio station licensed to San Jose, California, and broadcasts to the San Francisco Bay Area on 92.3 FM. KSJO is currently broadcasting a Bollywood music format branded as Bolly 92.3. It is owned by Universal Media Access.
Document 5: KCRW: KCRW (89.9 MHz FM) is a National Public Radio member station broadcasting from the campus of Santa Monica College in Santa Monica, where the station is licensed. KCRW airs original news and music programming in addition to programming from NPR and other affiliates. A network of repeaters and broadcast translators, as well as internet radio, allows the station to serve the Greater Los Angeles area and other communities in Southern California. The station's main transmitter is located in Los Angeles's Laurel Canyon district and broadcasts in the HD radio format. It is one of two full NPR members in the Los Angeles area; Pasadena-based KPCC is the other.
Document 6: London Underground: London Underground A deep - level Central line train at Lancaster Gate bound for Ealing Broadway A larger sub-surface Metropolitan line train at Farringdon bound for Aldgate Overview Locale Greater London, Buckinghamshire, Essex, Hertfordshire Transit type Rapid transit Number of lines 11 Number of stations 270 served (260 owned) Daily ridership 5 million Annual ridership 1.379 billion (2016 / 17) Website London Underground Operation Began operation 10 January 1863; 154 years ago (1863 - 01 - 10) Operator (s) London Underground Limited Reporting marks LT (National Rail) Technical System length 402 km (250 mi) Track gauge 1,435 mm (4 ft 8 ⁄ in) standard gauge Electrification 630 V DC fourth rail Average speed 33 km / h (21 mph)
Document 7: KKHK: KKHK (95.5 FM, "Bob FM") is a commercial adult hits radio station in Carmel, California, broadcasting to the Santa Cruz-Monterey-Salinas, California area on 95.5 FM. Its studios are in Monterey while its transmitter is located east of the city.
Document 8: List of Barcelona Metro stations: Lines L1, L2, L3, L4, L5, L9, L10, L11 and the Funicular de Montjuïc are administered by Transports Metropolitans de Barcelona (TMB), the city's transit company. Lines L6, L7, L8 and L12 are in origin commuter train services with extended frequency and integrated into the metro network, numbered as such, and run by the public Ferrocarrils de la Generalitat de Catalunya (FGC), which belongs to the Catalan government or Generalitat de Catalunya.
Document 9: Miami: Miami's heavy-rail rapid transit system, Metrorail, is an elevated system comprising two lines and 23 stations on a 24.4-mile (39.3 km)-long line. Metrorail connects the urban western suburbs of Hialeah, Medley, and inner-city Miami with suburban The Roads, Coconut Grove, Coral Gables, South Miami and urban Kendall via the central business districts of Miami International Airport, the Civic Center, and Downtown. A free, elevated people mover, Metromover, operates 21 stations on three different lines in greater Downtown Miami, with a station at roughly every two blocks of Downtown and Brickell. Several expansion projects are being funded by a transit development sales tax surcharge throughout Miami-Dade County.
Document 10: London: London's first and only cable car, known as the Emirates Air Line, opened in June 2012. Crossing the River Thames, linking Greenwich Peninsula and the Royal Docks in the east of the city, the cable car is integrated with London's Oyster Card ticketing system, although special fares are charged. Costing £60 million to build, it carries over 3,500 passengers every day, although this is very much lower than its capacity. Similar to the Santander Cycles bike hire scheme, the cable car is sponsored in a 10-year deal by the airline Emirates.
Document 11: KEZR: KEZR (106.5 FM, "Mix 106") is a radio station licensed to San Jose, California and serving the San Francisco Bay Area. They program an Adult Top 40 format and are owned by Alpha Media through the licensee Alpha Media Licensee LLC. Co-owned with KBAY, its studios are located in South San Jose just off US 101 on Hellyer Ave, and the transmitter is based from a site in Santa Teresa County Park.
Document 12: KRXQ: KRXQ is a commercial radio station in Sacramento, California, broadcasting on 98.5 FM. The station airs a Mainstream Rock music format branded as "98 Rock". The station is owned by Entercom Communications. Its studios are located in North Highlands (with a Sacramento address) and its transmitter is in Folsom.
Document 13: KFRC-FM: KFRC-FM (106.9 FM) is a commercial radio station in San Francisco, California, serving the San Francisco Bay Area. It currently simulcasts sister station KCBS, which carries an all-news format. The station transmits its signal from Mount Beacon atop the Marin Headlands above Sausalito, California, while studios are located in downtown San Francisco.
Document 14: WFAN-FM: WFAN-FM (101.9 MHz), also known as "Sports Radio 66 and 101.9 FM" or "The Fan", is a commercial FM sports radio station licensed to New York City. The station is owned and operated by Entercom, and is simulcast with WFAN (660 AM). WFAN-FM's studios are located in the combined Entercom facility in the Hudson Square neighborhood of Manhattan and its transmitter is located at the Empire State Building.
Document 15: KWAV: KWAV is a commercial radio station in Monterey, California, broadcasting to the Santa Cruz-Monterey-Salinas, California, area on 96.9 FM. Its studios are in Monterey while its transmitter is located on Mount Toro, south of Salinas. KWAV is a Class B FM radio station with a higher power than would be granted under the present U.S. Federal Communications Commission rules; it is often referred as a "Superpower" Grandfathered Class B.
ground_truth: 1878
sub_queries: What town is KFRC-FM liscensed in? Answer: San Francisco
when did cable cars start in San Francisco Answer: 1878