Question: Which river flows through the valley with which the AM radio station WWJZ serves?

full_context: Document 1: WPGG: WPGG (1450 AM; "WPG Talk Radio 104.1") is an American radio station licensed to serve the community of Atlantic City, New Jersey. The station is owned by Townsquare Media and the broadcast license is held by Townsquare Media Atlantic City License, LLC. Operating with non-directional 1,000 watts day and night, the station can be heard throughout New Jersey's Ocean, Atlantic, and Cape May Counties and into southern Delaware, coastal Maryland, coastal North Carolina, the southern side of much of Long Island, NY, and southern parts of Cape Cod, MA. Since October 22, 2012, the station broadcasts a talk radio format under the branding "WPG Talk Radio 1450." In May 2016, reflecting the frequency of its FM translator, 104.1 W281BH, the station rebranded as "WPG Talk Radio 104.1." WPGG's transmitter is located in Atlantic City, while its studios are in, and translator transmits from, Northfield, New Jersey.
Document 2: WTOC (AM): WTOC (1360 AM) is a radio station licensed to Newton, New Jersey. They are owned by Centro Biblico of NJ, Inc. and offer a Spanish-language Christian format. Until August 17, 2011, They offered an oldies music format with songs from the 1960s and 1970s along with a small amount oldies from 1955 to 1964 and a small amount of hits from the 1980s. They were a full-time affiliate of Scott Shannon's True Oldies Channel from ABC Radio. The station was owned by Clear Channel Communications from 2001 until 2011. From the station's 1953 sign-on until July 1, 2008, the radio station was known as WNNJ.
Document 3: Metropolitan statistical area: In the United States, a metropolitan statistical area (MSA) is a geographical region with a relatively high population density at its core and close economic ties throughout the area. Such regions are neither legally incorporated as a city or town would be, nor are they legal administrative divisions like counties or separate entities such as states. As such, the precise definition of any given metropolitan area can vary with the source. A typical metropolitan area is centered on a single large city that wields substantial influence over the region (e.g., Chicago or Atlanta). However, some metropolitan areas contain more than one large city with no single municipality holding a substantially dominant position (e.g., Dallas–Fort Worth metroplex, Norfolk-Virginia Beach (Hampton Roads), Riverside–San Bernardino (Inland Empire) or Minneapolis–Saint Paul).
Document 4: WJTA: WJTA "Holy Family Radio" (for: "Jesus, The Answer") is a non-commercial FM broadcasting station licensed to Glandorf, Ohio with studio and transmitter located near Leipsic in rural Putnam County. WJTA transmits at 88.9 mHz on the FM band. It is the first full-time Catholic radio station to come on the air in northwestern Ohio and within the Toledo Diocese...the others being WNOC "Annunciation Radio" licensed in Bowling Green and based in Toledo (with Sandusky sister station WHRQ) and WRRO licensed in Edon serving the Bryan area and the corner of the Ohio, Indiana and Michigan state lines.
Document 5: Wyoming Valley: The Wyoming Valley is an historic, industrialized region of Northeastern Pennsylvania once famous for fueling the industrial revolution in the United States with its many anthracite coal mines. As a metropolitan area, it is known as the Wilkes-Barre/Scranton area, the 97th-largest metropolitan area in the United States and the 4th largest in Pennsylvania. It is called the "Wilkes-Barre/Scranton Metropolitan Area" after its principal cities, Scranton and Wilkes-Barre, and makes up its own unique physiographic province, the Anthracite Valley in the geology of Pennsylvania. Greater Pittston makes up the center of the valley. Scranton is the most populated city in the metropolitan area with a population of 77,114. The city of Scranton has grown in population after the 2015 mid term census while Wilkes-Barre has declined in population. Wilkes-Barre is still the second most populated city in the metropolitan area and Hazleton is third. The airport(s) for this area are Wilkes-Barre/Scranton International Airport (Avoca) and the Wilkes-Barre Wyoming Valley Airport (Forty Fort).
Document 6: WZMF: WZMF is an AM broadcasting radio station licensed to the city of Nanticoke, Pennsylvania and serves the Wilkes-Barre, Scranton, and Hazleton radio markets with a Classic Hits format, switching from Adult Standards and Tropical and Spanish language adult contemporary format in December 2008. The station simulcasts sister WGMF located in Tunkhannock, Pennsylvania. WZMF broadcasts at a frequency of 730 kHz with 1,000 Watts of power during the daytime with a non-directional antenna. During the nighttime hours, the station must reduce its power substantially to just 12 Watts which limits its listen able area to just the local Nanticoke area. The power reduction at nighttime is required by rules set by the Federal Communications Commission in order to avoid interference from CKAC, a Canadian radio station also on 730 kHz. WZMF also broadcasts at a frequency of 104.5 MHz with 27 Watts of power from a site atop Dewey/West Mtn near Keyser Valley/Scranton, Pennsylvania which covers Scranton, Old Forge, Avoca, Dickson City, Pittston, and Jessup, Pennsylvania. WZMF also broadcasts at a frequency of 92.5 MHz with 250 Watts of power from a site atop Penobscot Mountain near Mountain Top, Pennsylvania which covers Wilkes-Barre, Mountain Top, Wyoming, Nanticoke, Hazleton, Dallas, West Pittston, and Kingston, Pennsylvania.
Document 7: WLOM-LP: WLOM-LP (92.7 FM, "92.7 The Voice") is a radio station broadcasting a Christian radio format. Licensed to serve Ocean City, New Jersey, USA, the station is currently owned by Calvary Chapel of Ocean City, Inc.
Document 8: Portland metropolitan area, Maine: The city of Portland, Maine, is the hub city of a metropolitan area in southern Maine, in the United States. The region is commonly known as Greater Portland or the Portland metropolitan area. For statistical purposes, the U.S. federal government defines three different representations of the Portland metropolitan area. The Portland–South Portland–Biddeford, Maine, metropolitan statistical area is a region consisting of three counties in Maine, anchored by the city of Portland and the smaller cities of South Portland and Biddeford. As of the 2010 census, the MSA had a population of 514,098. A larger combined statistical area (CSA), the Portland–Lewiston–South Portland combined statistical area, is defined as the combination of this metropolitan statistical area (MSA) with the adjacent Lewiston–Auburn MSA. The CSA comprises four counties in southern Maine. The Portland–South Portland metropolitan New England city and town area is defined on the basis of cities and towns rather than entire counties. It consists of most of Cumberland and York counties plus the town of Durham in Androscoggin County.
Document 9: New Jersey: New Jersey is a state in the Northeastern and mid-Atlantic regions of the United States. It is a peninsula, bordered on the north and east by the state of New York; on the east, southeast, and south by the Atlantic Ocean; on the west by the Delaware River and Pennsylvania; and on the southwest by the Delaware Bay and Delaware. New Jersey is the fourth-smallest state by area but the 11th-most populous and the most densely populated of the 50 U.S. states. New Jersey lies entirely within the combined statistical areas of New York City and Philadelphia and is the third-wealthiest state by median household income as of 2016.
Document 10: Philadelphia: Philadelphia ( ) is the largest city in the Commonwealth of Pennsylvania and the sixth-most populous city in the United States, with an estimated population of 1,567,872 and more than 6 million in the seventh-largest metropolitan statistical area, as of 2016 . Philadelphia is the economic and cultural anchor of the Delaware Valleya region located in the Northeastern United States at the confluence of the Delaware and Schuylkill Rivers with 7.2 million people residing in the eighth-largest combined statistical area in the United States.
Document 11: Delmar, Delaware: Delmar is a town in Sussex County, Delaware, United States, on the Maryland border along the Transpeninsular Line. Its motto is "The Little Town Too Big for One State." The population was 1,597 at the 2010 census, an increase of 13.5% over the previous decade. It is part of the Salisbury, Maryland-Delaware Metropolitan Statistical Area and a suburb of Salisbury, MD. When added with "twin city" Delmar, Maryland, the total population of the town was 4,600 at the 2010 Census.
Document 12: WROL: WROL is a radio station in the Boston, Massachusetts radio market. The station is owned by Salem Communications, and is located on 950 kHz on the AM dial. Most of WROL's programming is religious including local ministers as well as national radio hosts such as Dr. Charles Stanley, Jay Sekulow and Eric Metaxas. Former WBZ-TV news anchor-turned-minister Liz Walker also has a program on the station. WROL also airs several Irish music blocks on weekends, including the "Irish Hit Parade" on Saturdays and "A Feast of Irish Music" on Sundays.
Document 13: Delaware Valley: The Delaware Valley is the valley through which the Delaware River flows. By extension, this toponym is commonly used to refer to Greater Philadelphia or Philadelphia metropolitan area ("the [Lower] Delaware Valley Metropolitan Area"), which straddles the Lower Delaware River just north of its estuary. The Delaware Valley Metropolitan Area is located at the southern part of the Northeast megalopolis and as such, the Delaware Valley can be described as either a metropolitan statistical area (MSA), or as a broader combined statistical area (CSA). The Delaware Valley Metropolitan Area is composed of several counties in southeastern Pennsylvania and southwestern New Jersey, one county in northern Delaware and one county in northeastern Maryland. The MSA has a population of over 6 million, while the CSA has a population of over 7.1 million (as of the 2010 Census Bureau count). Philadelphia, being the region's major commercial, cultural, and industrial center, wields a rather large sphere of influence that affects the counties that immediately surround it.
Document 14: Salem County, New Jersey: Salem County is a county located in the U.S. state of New Jersey. Its western boundary is formed by the Delaware River and it has the eastern terminus of the Delaware Memorial Bridge, connecting to New Castle, Delaware. Its county seat is Salem. The county is part of the Delaware Valley area. As of the 2016 Census estimate, the county's population was 63,436, making it the state's least populous county, representing a 4.0% decrease from the 66,083 enumerated at the 2010 Census, in turn increasing by 1,798 (+2.8%) from the 64,285 counted in the 2000 Census, retaining its position as the state's least populous county. The most populous place was Pennsville Township, with 13,409 residents at the time of the 2010 Census. Lower Alloways Creek Township covers 72.46 sqmi , the largest total area of any municipality.
Document 15: WWJZ: WWJZ (640 kHz) is an AM radio station licensed to Mount Holly, New Jersey, serving Philadelphia and the Delaware Valley. The station airs Catholic talk programming and is owned and operated by Relevant Radio.
ground_truth: Delaware River