Question: What subgenre of the blues is the singer-songwriter of Mannish Boy associated with?

full_context: Document 1: Muddy Waters: McKinley Morganfield (April 4, 1913 -- April 30, 1983), known professionally as Muddy Waters, was an American blues musician who is often cited as the ``father of modern Chicago blues ''.
Document 2: Boogie Chillen': "Boogie Chillen'" or "Boogie Chillun" is a blues song first recorded by John Lee Hooker in 1948. It is a solo performance featuring Hooker's vocal, electric guitar, and rhythmic foot stomps. The lyrics are partly autobiographical and alternate between spoken and sung verses. The song was his debut record release and in 1949, it became the first "down-home" electric blues song to reach number one in the R&B records chart.
Document 3: After the Rain (Muddy Waters album): After the Rain is the sixth studio album by Muddy Waters, a follow-up to the previous years' "Electric Mud" and sharing many of the musicians from that album. Unlike "Electric Mud", "After the Rain" contained mostly his own compositions and the songs, while still distorted, are less overtly psychedelic.
Document 4: It's a Man's Man's Man's World: ``It's a Man's Man's Man's World ''is a song by James Brown and Betty Jean Newsome. Brown recorded it on February 16, 1966 in a New York City studio and released it as a single later that year. It reached No. 1 on the Billboard R&B chart and No. 8 on the Billboard Hot 100. Its title is a word play on the 1963 comedy film It's a Mad, Mad, Mad, Mad World.
Document 5: Trouble No More (song): "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.
Document 6: Fathers and Sons (album): Fathers and Sons is the seventh studio album by American blues musician Muddy Waters, originally released as a double LP by Chess Records in August 1969.
Document 7: Howlin' Wolf: Chester Arthur Burnett (June 10, 1910 – January 10, 1976), known as Howlin' Wolf, was a Chicago blues singer, guitarist, and harmonica player, originally from Mississippi. With a booming voice and imposing physical presence, he is one of the best-known Chicago blues artists. The musician and critic Cub Koda noted, "no one could match Howlin' Wolf for the singular ability to rock the house down to the foundation while simultaneously scaring its patrons out of its wits." Producer Sam Phillips recalled, "When I heard Howlin' Wolf, I said, 'This is for me. This is where the soul of man never dies. Several of his songs, including "Smokestack Lightnin'", "Killing Floor" and "Spoonful", have become blues and blues rock standards. In 2011, "Rolling Stone" magazine ranked him number 54 on its list of the "100 Greatest Artists of All Time".
Document 8: W. C. Handy: William Christopher Handy (November 16, 1873 -- March 28, 1958) was a composer and musician, known as the Father of the Blues. An African American, Handy was one of the most influential songwriters in the United States. One of many musicians who played the distinctively American blues music, Handy did not create the blues genre and was not the first to publish music in the blues form, but he took the blues from a regional music style (Delta blues) with a limited audience to a new level of popularity.
Document 9: Hoochie Coochie Man: "Hoochie Coochie Man" (originally titled "I'm Your Hoochie Cooche Man") is a blues standard written by Willie Dixon and first recorded by Muddy Waters in 1954. The song makes reference to hoodoo folk magic elements and makes novel use of a stop-time musical arrangement. It became one of Waters' most popular and identifiable songs and helped secure Dixon's role as Chess Records' chief songwriter.
Document 10: Forty Days and Forty Nights: "Forty Days and Forty Nights" is a blues song recorded by Muddy Waters in 1956. Called "a big, bold record", it was a hit, spending six weeks in the "Billboard" R&B chart, where it reached number seven. "Forty Days and Forty Nights" has been interpreted and recorded by a variety of artists.
Document 11: Walkin' Blues: "Walkin' Blues" or "Walking Blues" is a blues standard written and recorded by American Delta blues musician Son House in 1930. Although unissued at the time, it was part of House's repertoire and other musicians, including Robert Johnson and Muddy Waters, adapted the song and recorded their own versions.
Document 12: Mannish Boy: "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.
Document 13: Chicago blues: The Chicago blues is a form of blues music indigenous to Chicago, Illinois. Chicago blues is an electric blues style of urban blues. Urban blues evolved from classic blues following the Great Migration, or the Great Northern Drive, which was both forced and voluntary at times, of African Americans from the southern United States to the industrial cities of the north, such as Chicago. Muddy Waters directly joined that migration, like many others, such as in Florida, avoiding the more harshly southern Jim Crow laws. Bruce Iglauer, founder of Alligator Records stated that, ``Chicago blues is the music of the industrial city, and has an industrial sense about it. ''Additionally, recognizing the shift in blues, Chicago blues singer and guitarist Kevin Moore expressed the blues transition stating,`` You have to put some new life into it, new blood, new perspectives. You ca n't keep talking about mules, workin 'on the levee.'' Chicago blues was heavily influenced by Mississippi bluesmen who traveled to Chicago in the early 1940s. The development of blues, up to Chicago blues, is arguably as follows: Country blues, to city blues, to urban blues. Chicago blues is based on the sound of the electric guitar and the harmonica, with the harmonica played through a PA system or guitar amplifier.
Document 14: Big Bill Morganfield: William "Big Bill" Morganfield (born June 19, 1956) is an American blues singer and guitarist, who is the son of Muddy Waters.
Document 15: I'm Ready (blues song): "I'm Ready" is a blues song written by Willie Dixon and first recorded by Muddy Waters in 1954. It was a hit, spending nine weeks on the Billboard R&B chart where it reached number four. The song became a blues standard and has been compared to "Hoochie Coochie Man", the standard also written by Dixon that Waters recorded earlier in 1954.
ground_truth: Chicago blues
sub_queries: Which singer-songwriter is Mannish Boy the fifth studio album of? Answer: Muddy Waters
Muddy Waters is associated with which subgenre of the blues Answer: Chicago blues