Question: What subject other than the first black comedian to successfully cross over to white audiences did Shelia P. Moses write on?

Context paragraphs:
Shelia P. Moses: Shelia P. Moses, is an African-American writer whose subjects include comedian Dick Gregory and The Legend of Buddy Bush.

Syr Law: Crystal Dionne Porter, professionally known as Syr (pronounced S-e-e-r) Law is an American actress.  She has performed in leading roles in a variety of films ranging from romantic comedies and dramas to science fiction.  She received a WMIFF nomination and a win at the Nollywood Film Critics Award (NAFCA) for her performance in “”.  This same film open the door to other American actors, as she was the first African-American Actress to successfully cross over into all African genre and win several awards and nominations worldwide.

Dick Gregory: Richard Claxton Gregory (October 12, 1932 – August 19, 2017) was an African-American comedian, civil rights activist, social critic, writer, entrepreneur, conspiracy theorist, and occasional actor.  During the turbulent 1960s, Gregory became a pioneer in stand-up comedy for his "no-holds-barred" sets, in which he mocked bigotry and racism.  He performed primarily to black audiences at segregated clubs until 1961, when he became the first black comedian to successfully cross over to white audiences, appearing on television and putting out comedy record albums.

Ivy Ross: Ivy Ross (1955) is an American business executive and jewelry designer.  She was appointed Head of Google Glass at Google X on May 19, 2014.  Ivy Ross’s metal work in jewelry design is in the permanent collections of 12 international museums, including the Smithsonian in Washington D.C.  One of few recognized fine artists to successfully cross over into the business world, Ross is also a keynote speaker and a member of several boards, and has been hailed as a “creative visionary” by the art world.

Billy Kersands: Billy Kersands (c. 1842–1915) was an African-American comedian and dancer.  He was the most popular black comedian of his day, best known for his work in blackface minstrelsy.  In addition to his skillful acrobatics, dancing, singing, and instrument playing, Kersands was renowned for his comic routines involving his large mouth, which he could contort comically or fill with objects such as billiard balls or saucers.  His stage persona was that of the dim-witted black man of the type that had been popularized in white minstrel shows.  Modern commentators such as Mel Watkins cite him as one of the earliest black entertainers to have faced the dilemma of striking a balance between social satire and the reinforcement of negative stereotypes.

Soul blues: Soul blues is a style of blues music developed in the late 1960s and early 1970s that combines elements of soul music and urban contemporary music.  Singers and musicians who grew up listening to the traditional electric blues of artists such as Muddy Waters, Bo Diddley, Jimmy Reed and Elmore James; soul singers such as Sam Cooke, Ray Charles and Otis Redding; and gospel music wanted to bridge their favorite music together.  Bobby Bland was one of the pioneers of this style.  This is a subgenre of blues that is very popular with African American audiences but less known by white audiences.  The style continues to be popular in the new millennium.

Master Juba: Master Juba (ca. 1825 – ca. 1852 or 1853) was an African-American dancer active in the 1840s.  He was one of the first black performers in the United States to play onstage for white audiences and the only one of the era to tour with a white minstrel group.  His real name was believed to be William Henry Lane, and he was also known as "Boz's Juba" following Dickens's graphic description of him in "American Notes".

Old-Time Religion: ("Give Me That") "Old-Time Religion" (and similar spellings) is a traditional Gospel song dating from 1873, when it was included in a list of Jubilee songs—or earlier.  It has become a standard in many Protestant hymnals, though it says nothing about Jesus or the gospel, and covered by many artists.  Some scholars, such as Forrest Mason McCann, have asserted the possibility of an earlier stage of evolution of the song, in that "the tune may go back to English folk origins" (later dying out in the white repertoire but staying alive in the work songs of African Americans).  In any event, it was by way of Charles Davis Tillman that the song had incalculable influence on the confluence of black spiritual and white gospel song traditions in forming the genre now known as southern gospel.  Tillman was largely responsible for publishing the song into the repertoire of white audiences.  It was first heard sung by African-Americans and written down by Tillman when he attended a camp meeting in Lexington, South Carolina in 1889.

Johnny B. Goode: "Johnny B. Goode" is a 1958 rock-and-roll song written and first recorded by Chuck Berry.  The song was a major hit among both black and white audiences, peaking at number two on "Billboard" magazine's Hot R&B Sides chart and number eight on its Hot 100 chart.

Euzhan Palcy: Euzhan Palcy is a film director, writer and producer from Martinique, French West Indies.  She is notable for being the first black woman director produced by a major Hollywood studio (MGM), for "A Dry White Season", as well as being the only woman filmmaker to have directed Marlon Brando, whom she brought back to the screen after a gap of nine years.  Palcy is the first black director (male or female) to direct an actor to an Oscar nomination and the first black director to win a César Award, the highest French film award.  She is also the first black director to win of a Venice Film Festival Award (Silver Lion).

Supporting paragraphs: Shelia P. Moses Dick Gregory
Answer: The Legend of Buddy Bush