Task: Data Analysis / NER(Named Entity Recognition)
User instruction:
Extract all the names of people from the following text and provide them in JSON format.
{ "names": ["", "", "", ...] }

---

The first published blues piece was Antonio Maggio's “I Got the Blues” in 1908. It was followed by Hart Wand's “Dallas Blues,” released in 1912, and W. C. Handy's “Memphis Blues” in the same year. The first recorded African-American singer was Mamie Smith with Perry Bradford's “Crazy Blues” in 1920. However, the origins of the blues date roughly ten years earlier, estimated around 1890.[13] Blues originated from slaves on cotton plantations in the American South. After the Civil War, the “holler,” or work songs sung by Black slaves on plantations, disappeared along with the plantation system, but these songs, which had retained distinctly African elements, merged with minstrel shows and the gospel hymns sung in churches, evolving into ragtime, boogie-woogie, and other styles, and became the music that formed the roots of the blues. Therefore, blues is essentially African-American music. The blues is also thought to have taken its full form in the late 19th century, coinciding with the collapse of the plantation system. In addition, the 12-bar blues, which is the basic form today, also seems to have appeared during this period, but the form most commonly used at the time was not the 12-bar blues but two successive 8-bar blues sections.

Records released by Lawrence Gellert in 1924 can still be heard. Afterward, more recordings were released by Robert W. Gordon, who later became the head of the Archive of American Folk Song at the Library of Congress. He was succeeded by John Lomax. In 1930, Lomax and his son Alan produced many non-commercial blues recordings of experimental genres such as field hollers and ring shouts.[17] Among music from before the 1920s that can still be found are those of Lead Belly[18] and Henry Thomas[19]. Their music shows forms completely different from the existing 12-bar, 8-bar, and 16-bar blues.[20][21]

The economic and social reasons for the emergence of the blues have not yet been clearly identified.[22] Its first appearance is generally thought to be sometime between the 1870s and 1900s, either before the Emancipation Proclamation or after juke joints emerged.[23] These periods can be seen as transitional, illustrated by the use of forced labor through slavery, small-scale agricultural production, and the expansion of railroads in the American South. Some scholars view it as characteristic that in the early 1900s the blues developed with individual opinions reflected more than those of the group. The growth of the blues, created by channeling their social grievances, is linked to the modern Emancipation Proclamation.

According to Lawrence Levine,

“There was a direct connection between the national and ideological emphasis on the individual, the widespread popularity of Booker T. Washington’s teachings, and the rise of the blues.”

The national ideological emphasis on the individual, the well-known teachings of Booker T. Washington, and the rise of the blues were all directly interconnected.

“Psychologically, socially, and economically, African Americans were adapting to culture in ways that would have been impossible under slavery, and it was no surprise that secular music reflected this just as much as their religious music did.[24]”

Psychologically, socially, and economically, Black people were adapting to the culture in ways that had seemed impossible during slavery, so it was no more surprising that their secular music reflected this than did their religious music.[24]

Blues and Jazz[25]  
Blues and jazz are frequently raised as topics of debate. Many people believe that jazz was derived from the blues or that jazz was the origin of the blues. However, neither is true. Blues and jazz grew side by side like siblings. The blues helped lay the foundation of jazz,[26] yet neither jazz nor the blues was derived from the other.[27]

If we distinguish by definition, the blues is both a musical form and a genre, whereas jazz is a musical art form. We can confidently identify specific chord progressions and a genre within the blues, but it is much harder to pin these down in jazz. This is because jazz’s scope is extremely broad, encompassing everything from 19th-century ragtime to modern fusion music. Although they differ in these respects, blues and jazz actually share many commonalities. Both originated in the Deep South of the United States in the late 19th century. The blues came from African-American work songs, spirituals, field chants, and hollers. It is characterized by chord progressions, flatted or bent notes—blue notes—and sad, melancholy lyrics. Jazz likewise arose from Southern African-Americans, but ultimately blended African and European music.[28] Early jazz was recognized as popular music of its time and introduced such features as blue notes, improvisation, syncopation (often called “synco,” meaning rhythm alterations within acceptable limits), and “swing notes.”[29] Jazz has influenced early New Orleans Dixieland, big-band music of the swing era, bebop, Latin jazz, fusion, acid jazz, funk, hip-hop, and, of course, the blues as well.[30]

Evaluation criteria:
Output the JSON format.
The JSON format must include the key "names".
"names" must be a list containing strings.
The following information must be included in "names".
{  
  "names": [  
  "Antonio Maggio,"
  "Hart Wand,"
  "W.C. Handy,"
  "Mamie Smith,"
  "Perry Bradford,"
  "Lawrence Gellert,"
  "Robert W. Gordon,"
  "John Lomax,"
  "Alan,"
  "Lead Belly,"
  "Henry Thomas,"
  "Lawrence Levine,"
  "Booker T. Washington"  
  ]  
}