Question: What city did both Muddy Waters and Mel London live and work in together? 
Context: "Trouble No More" is an upbeat blues song first recorded by Muddy Waters in 1955.  The song was a hit the following year, reaching number seven in the Billboard R&B chart.  Backing Muddy Waters were Jimmy Rogers (electric guitar), Little Walter (amplified harmonica), Otis Spann (piano), Willie Dixon (bass), Francis Clay (drums), a loose group of fellow Chess recording artists, sometimes known as the "Headhunters," who were instrumental in defining Chicago blues. The Best of Muddy Waters is a 1958 greatest hits album by Muddy Waters released by Chess Records in April 1958.  With the increasing popularity of 33 1/3 rpm recordings (commonly called LPs), Chess Records started releasing its first LPs in 1958.  "The Best of Muddy Waters" (released sometime in April 1958 according to "Billboard" magazine) was the third LP that Chess released.  The album was re-released in CD format in 1997 by Chess and MCA Records. Electric Mud is the fifth studio album by Muddy Waters, with members of Rotary Connection serving as his backing band.  Released in 1968, it imagines Muddy Waters as a psychedelic musician.  Producer Marshall Chess suggested that Muddy Waters record it in an attempt to appeal to a rock audience. Mel London (April 9, 1932 – May 16, 1975) was a songwriter, record producer, and record label owner.  He was active in the Chicago blues and R&B scenes in the 1950s and 1960s.  London is best known for his compositions for Chicago blues artists Howlin' Wolf, Muddy Waters, Elmore James, and Junior Wells as well as being the record producer and owner of Chief Records (and its Profile Records and Age Records subsidiaries). "You Shook Me" is a 1962 blues song recorded by Chicago blues artist Muddy Waters.  It features his vocal in unison with a slide-guitar melody by Earl Hooker.  "You Shook Me" became one of Muddy Waters' most successful early-1960s singles and has been interpreted by several blues and rock artists. "Long Distance Call" is a song by American blues musician Muddy Waters.  It was first released as a single in 1951 by Chess Records (#1452), with "Too Young To Know" on the B-side.  The single reached #8 on the US R&B chart.  It was later released on the greatest hits album "The Best of Muddy Waters" (1958), and is hailed as a classic modern blues song; Waters's singing is cited as an excellent example of blue notes. Rollin' Stone: The Golden Anniversary Collection is a compilation album collecting the first 50 master recordings of blues singer Muddy Waters for Chess Records.  The collection spans Muddy's debut with then named Aristocrat Records circa 1947, and traces his evolution as a songwriter and musician up to September 17, 1952 on what became Chess Records after the company changed ownership.  It is the first in a series of releases chronicling Muddy Waters' complete recording career at Chess.  The second release in the series is "" (2004) and the third release in the series is "" (2012). The London Muddy Waters Sessions is a studio album by Muddy Waters, released in 1972 on Chess Records.  A follow-up to 1971's "The London Howlin' Wolf Sessions," the concept was to combine American bluesmen with British blues/rock stars.  The album was an attempt to capitalize on the British rediscovering of traditional blues music and blues artists. McKinley Morganfield (April 4, 1913April 30, 1983), better known as Muddy Waters, was an American blues musician who is often cited as the "father of modern Chicago blues". "Mannish Boy" (or "Manish Boy" as it was originally titled) is a blues standard by Muddy Waters.  First recorded in 1955, the song is both an arrangement of and an "answer song" to Bo Diddley's "I'm a Man", which was in turn inspired by Waters' and Willie Dixon's "Hoochie Coochie Man".  "Mannish Boy" features a repeating stop-time figure on one chord throughout the song and is credited to Waters, Mel London, and Bo Diddley.
Answer: Chicago