Background: The Beatles were an English rock band formed in Liverpool in 1960. With members John Lennon, Paul McCartney, George Harrison and Ringo Starr, they became widely regarded as the foremost and most influential music band. Rooted in skiffle, beat and 1950s rock and roll, the Beatles later experimented with several musical styles, ranging from pop ballads and Indian music to psychedelia and hard rock, often incorporating classical elements and unconventional recording techniques in innovative ways. In 1963 their enormous popularity first emerged as "Beatlemania"; as the group's music grew in sophistication, led by primary songwriters Lennon and McCartney, the band were integral to pop music's evolution into an art form and to the development of the counterculture of the 1960s.
Context: In Icons of Rock: An Encyclopedia of the Legends Who Changed Music Forever, Scott Schinder and Andy Schwartz describe the Beatles' musical evolution:  In their initial incarnation as cheerful, wisecracking moptops, the Fab Four revolutionised the sound, style, and attitude of popular music and opened rock and roll's doors to a tidal wave of British rock acts. Their initial impact would have been enough to establish the Beatles as one of their era's most influential cultural forces, but they didn't stop there. Although their initial style was a highly original, irresistibly catchy synthesis of early American rock and roll and R&B, the Beatles spent the rest of the 1960s expanding rock's stylistic frontiers, consistently staking out new musical territory on each release. The band's increasingly sophisticated experimentation encompassed a variety of genres, including folk-rock, country, psychedelia, and baroque pop, without sacrificing the effortless mass appeal of their early work.  In The Beatles as Musicians, Walter Everett describes Lennon and McCartney's contrasting motivations and approaches to composition: "McCartney may be said to have constantly developed - as a means to entertain - a focused musical talent with an ear for counterpoint and other aspects of craft in the demonstration of a universally agreed-upon common language that he did much to enrich. Conversely, Lennon's mature music is best appreciated as the daring product of a largely unconscious, searching but undisciplined artistic sensibility."  Ian MacDonald describes McCartney as "a natural melodist - a creator of tunes capable of existing apart from their harmony". His melody lines are characterised as primarily "vertical", employing wide, consonant intervals which express his "extrovert energy and optimism". Conversely, Lennon's "sedentary, ironic personality" is reflected in a "horizontal" approach featuring minimal, dissonant intervals and repetitive melodies which rely on their harmonic accompaniment for interest: "Basically a realist, he instinctively kept his melodies close to the rhythms and cadences of speech, colouring his lyrics with bluesy tone and harmony rather than creating tunes that made striking shapes of their own." MacDonald praises Harrison's lead guitar work for the role his "characterful lines and textural colourings" play in supporting Lennon and McCartney's parts, and describes Starr as "the father of modern pop/rock drumming".
Question: What albums did they make?
Answer: the rhythms and cadences of speech, colouring his lyrics with bluesy tone and harmony rather than creating tunes that made striking shapes of their own.

Problem: Background: Muddy Waters' birthplace and date are not conclusively known. He stated that he was born in Rolling Fork, Mississippi, in 1915, but it is believed to be more likely that he was born in Jug's Corner, in neighboring Issaquena County, in 1913. Recent research has uncovered documentation showing that in the 1930s and 1940s, before his rise to fame, the year of his birth was reported as 1913 on his marriage license, recording notes, and musicians' union card. A 1955 interview in the Chicago Defender is the earliest in which he stated 1915 as the year of his birth, and he continued to say this in interviews from that point onward.
Context: Initially, the Chess brothers would not allow Muddy Waters to use his working band in the recording studio; instead, he was provided with a backing bass by Ernest "Big" Crawford or by musicians assembled specifically for the recording session, including "Baby Face" Leroy Foster and Johnny Jones. Gradually, Chess relented, and by September 1953 he was recording with one of the most acclaimed blues groups in history: Little Walter Jacobs on harmonica, Jimmy Rogers on guitar, Elga Edmonds (also known as Elgin Evans) on drums, and Otis Spann on piano. The band recorded a series of blues classics during the early 1950s, some with the help of the bassist and songwriter Willie Dixon, including "Hoochie Coochie Man", "I Just Want to Make Love to You", and "I'm Ready".  Along with his former harmonica player Little Walter Jacobs and recent southern transplant Howlin' Wolf, Muddy Waters reigned over the early 1950s Chicago blues scene, his band becoming a proving ground for some of the city's best blues talent. Little Walter continued a collaborative relationship long after he left Muddy Waters's band in 1952, appearing on most of the band's classic recordings in the 1950s. Muddy Waters developed a long-running, generally good-natured rivalry with Wolf. The success of his ensemble paved the way for others in his group to make their own solo careers. In 1952, Little Walter left when his single "Juke" became a hit, and in 1955, Rogers quit to work exclusively with his own band, which had been a sideline until that time.  During the mid-1950s, Muddy Waters' singles were frequently on Billboard magazine's various Rhythm & Blues charts including "Sugar Sweet" in 1955 and "Trouble No More", "Forty Days and Forty Nights", and "Don't Go No Farther" in 1956. 1956 also saw the release of one of his best-known numbers, "Got My Mojo Working", although it did not appear on the charts. However, by the late 1950s, his singles success had come to an end, with only "Close to You" reaching the chart in 1958. Also in 1958, Chess released Muddy Waters' first album, The Best of Muddy Waters, which collected twelve of his singles up to 1956.
Question: what instruments did they play?
Answer:
Jimmy Rogers on guitar, Elga Edmonds (also known as Elgin Evans) on drums, and Otis Spann on piano.