Question: Adam May was an anchor and reporter for what virtual and VHF digital channel that is a CBS owned and operated station?
Context: KRNV-DT, virtual channel 4 (VHF digital channel 7) is an NBC–affiliated television station located in Reno, Nevada, United States.  The station is owned by Intermountain West Communications Company and operated by Sinclair Broadcast Group (with a license acquisition by Cunningham Broadcasting pending) as part of a virtual triopoly with Fox affiliate KRXI-TV (channel 11), which is owned by Sinclair outright, and MyNetworkTV affiliate KAME-TV (channel 21), which is owned by Deerfield Media and operated by Sinclair.  KRNV maintains studios located on Vassar Street in Reno, and its transmitter is located on Slide Mountain between SR 431 and I-580/US 395/US 395 Alt.  in Washoe County.  The station can also be seen on Charter channel 4 and in high definition on digital channel 784. WJZ-TV, virtual and VHF digital channel 13, is a CBS owned-and-operated television station licensed to Baltimore, Maryland, United States.  The station is owned by the CBS Television Stations subsidiary of CBS Corporation.  WJZ-TV's studios and offices are located on Television Hill in the Woodberry section of Baltimore, adjacent to the transmission tower it shares with four other Baltimore television stations. KSAT-TV, virtual and VHF digital channel 12, is an ABC-affiliated television station licensed to San Antonio, Texas, United States.  The station is owned by the Graham Media Group subsidiary of Graham Holdings Company.  KSAT maintains studio facilities located on North St. Mary's Street on the northern edge of downtown, and its transmitter is located off of Route 181 in northwest Wilson County (northeast of Elmendorf).  On cable, the station is available on Charter Spectrum channel 13, and Grande Communications and AT&T U-verse channel 12.  A high definition feed is offered on Spectrum digital channel 1200, Grande digital channel 812, and U-verse channel 1012. KOLN, virtual and VHF digital channel 10, is the CBS-affiliated television station licensed to Lincoln, Nebraska, United States.  Owned by Gray Television, KOLN serves a large swath of southeast and central Nebraska through a large network of translator stations.  The station also operates a full-power semi-satellite, KGIN (virtual and VHF digital channel 11) in Grand Island, which serves the central portion of the market; KOLN and KGIN's on-air branding of 10/11 represents these two full-powered signals.  Combined, the two stations serve one of the largest coverage areas in the United States, stretching across 42 counties in southern and central Nebraska—almost two-thirds of the state's land mass—and an additional four counties in Kansas.  The station's studios are located on North 40th Street in Lincoln, with a central Nebraska bureau located on North Locust Street in Grand Island.  KOLN's transmitter is southeast of Goehner, while KGIN's transmitter is near Heartwell. WGVU-TV, virtual channel 35 (VHF digital channel 11), is a PBS member television station licensed to Grand Rapids, Michigan, United States.  WGVU operates a full-time satellite station, WGVK (virtual channel 52, VHF digital channel 5) in Kalamazoo.  The two stations are owned by Grand Valley State University.  Studios are located in the Meijer Public Broadcast Center, located in the Eberhard Center on the GVSU Pew Campus; WGVU's transmitter is located near the GVSU Campus in Allendale Charter Township, WGVK's transmitter is located in Kalamazoo's Westwood neighborhood. Adam May is a television news anchor and reporter at WBAL-TV in Baltimore.  He was previously lead contributor to Al Jazeera America's flagship show, "America Tonight."  May was also previously an anchor and reporter at Baltimore’s CBS owned and operated station, WJZ-TV. WTHR, virtual and VHF digital channel 13, is an NBC-affiliated television station licensed to Indianapolis, Indiana, United States.  The station is owned by the Dispatch Broadcast Group of Columbus, Ohio, and is a sister station to MeTV affiliate WALV-CD (channel 46) and Columbus' CBS affiliate WBNS-TV (channel 10).  WTHR and WALV share studio facilities located on North Meridian (south of I-65) in downtown Indianapolis; WTHR maintains transmitter facilities located near Ditch Road and West 96th Street in Carmel.  On cable, WTHR is available on Comcast Xfinity and Charter Spectrum channel 12, and AT&T U-verse channel 13; and in high definition on Spectrum digital channel 1012, and Xfinity and U-verse channel 1013. KLRN, virtual and VHF digital channel 9, is a PBS member television station located in San Antonio, Texas, United States.  The station is owned by the Alamo Public Telecommunications Council (formerly the Southwest Texas Public Broadcasting Council).  KLRN maintains studio facilities located on Broadway Street in downtown San Antonio, and its transmitter is located on Foster Road (near Calaveras Lake) in the southeastern part of the city.  On cable, the station is available on Charter Spectrum and Grande Communications channel 10, and AT&T U-verse channel 9.  A high definition feed is offered on Spectrum digital channel 1221, Grande digital channel 810, and U-verse channel 1009. WLFI-TV, virtual channel 18 (VHF digital channel 11), is a CBS affiliated television station located in Lafayette, Indiana, United States.  The station is owned by Heartland Media.  WLFI maintains studio facilities located on Yeager Road in West Lafayette, and its transmitter is located on County Road 700 in rural northwestern Clinton County (southwest of Rossville); master control and some internal operations are housed at the studio facilities of sister station WISH-TV on North Meridian Street in northwestern Indianapolis.  On cable, WLFI-TV is available on Comcast Xfinity channel 8 and Metronet channel 18 in standard definition and in high definition on Xfinity digital channel 1018 and Metronet channel 818. KCWX, virtual channel 2 (VHF digital channel 5), is a MyNetworkTV-affiliated television station licensed to Fredericksburg, Texas, United States.  The station is owned by Austin-based Corridor Television.  Although Fredericksburg is within the Austin DMA, the station is officially assigned by Nielsen to the San Antonio market, and its signal covers the San Antonio and Bexar County area.  KCWX maintains studio facilities in northwest San Antonio, and its transmitter is located on the Gillespie–Kendall county line.  On cable, the station is available on Charter Spectrum channel 4, and Grande Communications and AT&T U-verse channel 2.  A high definition feed is offered on Spectrum digital channel 1215, Grande digital channel 802, and U-verse channel 1002.
Answer: WJZ-TV