Assertion: rock's music | /r/CapableOf | evolve in the united states
Facets:
value: during early 1950s
type: TEMPORAL
value: during the late 1940s
type: TEMPORAL
Source sentences:
text: Rock and roll (often written as rock & roll, rock 'n' roll, or rock 'n roll) is a genre of popular music that originated and evolved in the United States during the late 1940s and early 1950s from musical styles such as gospel, jump blues, jazz, boogie woogie, rhythm and blues, and country music.
text: Rock and roll (often written as rock & roll or rock 'n' roll) is a genre of popular music that originated and evolved in the United States during the late 1940s and early 1950s, primarily from a combination of African American blues, country , jazz, and gospel music.
text: Rock and roll (also known as rock ’n’ roll) is a form of music that evolved in the United States in the late 1940s and early 1950s.