Question: What did a niece of Cissy Houston became a United Nations Global Ambassador for?

full_context: Document 1: Cissy Houston: Emily "Cissy" Houston (née Drinkard; born September 30, 1933) is an American soul and gospel singer. After a successful career singing backup for such artists as Elvis Presley and Aretha Franklin, Houston embarked on a solo career, winning two Grammy Awards for her work. Houston is the mother of singer Whitney Houston, grandmother of Whitney's daughter, Bobbi Kristina Brown, aunt of singers Dionne and Dee Dee Warwick, and a cousin of opera singer Leontyne Price.
Document 2: Eartha Kitt: Eartha Mae Kitt (January 17, 1927 – December 25, 2008) was an American singer, actress, dancer, activist and comedian, known for her highly distinctive singing style and her 1953 recordings of "C'est si bon" and the enduring Christmas novelty smash "Santa Baby", which were both US Top 10 hits. Orson Welles once called her the "most exciting woman in the world".
Document 3: Dionne Warwick: Dionne Warwick ( ) (born Marie Dionne Warrick; December 12, 1940) is an American singer, actress and television show host, who became a United Nations Global Ambassador for the Food and Agriculture Organization, and a United States Ambassador of Health.
Document 4: Dinah Shore: Dinah Shore (born Fannye Rose Shore; February 29, 1916 – February 24, 1994) was an American singer, actress, and television personality, and the top-charting female vocalist of the 1940s. She rose to prominence as a recording artist during the Big Band era, but achieved even greater success a decade later, in television, mainly as hostess of a series of variety programs for Chevrolet.
Document 5: Diana Ross: Diana Ernestine Earle Ross (born March 26, 1944) is an American singer, songwriter, actress, and record producer. Born and raised in Detroit, Michigan, Ross rose to fame as the lead singer of the vocal group The Supremes, which, during the 1960s, became Motown's most successful act, and is to this day the United States' most successful vocal group, as well as one of the world's best-selling girl groups of all time. Ross' success as lead singer of The Supremes made it possible for future African-American R&B and soul acts to find mainstream success. The group released a record-setting twelve number-one hit singles on the US "Billboard" Hot 100, including "Where Did Our Love Go", "Baby Love", "Come See About Me", "Stop! In the Name of Love", "You Can't Hurry Love", "You Keep Me Hangin' On", "Love Child", and "Someday We'll Be Together".
Document 6: Whitney Houston: Whitney Elizabeth Houston (August 9, 1963 – February 11, 2012) was an American singer, actress, producer, and model. In 2009, "Guinness World Records" cited her as the most awarded female act of all-time. Houston is one of the best-selling music artists of all-time, with 200 million records sold worldwide. She released seven studio albums and two soundtrack albums, all of which have diamond, multi-platinum, platinum, or gold certification. Houston's crossover appeal on the popular music charts, as well as her prominence on MTV, starting with her video for "How Will I Know", influenced several African American women artists who follow in her footsteps.
Document 7: Marion Cotillard: Marion Cotillard (] ; born 30 September 1975) is a French actress, singer-songwriter, musician, environmentalist and spokesperson for Greenpeace who achieved international fame with the film "La Vie en Rose" (2007). She is the recipient of an Academy Award, a BAFTA Award, a Golden Globe Award, two César Awards, a European Award, and a Lumières Award. Cotillard has appeared in more than 50 feature films and is also known for being the face of Lady Dior handbags since 2008. She became a Knight of the Order of Arts and Letters in France in 2010 and promoted to Officer in 2016. Was named "The Most Bankable French Actress of the 21st Century" in 2014, and described as "the great silent film actress of our time" by The Daily Telegraph's Robbie Collin, for her ability to show emotions only with her eyes and facial expressions, although she has never appeared in a silent film. She received France's highest honor and was made a Knight of the Legion of Honour in 2016.
Document 8: CeCe Winans: Priscilla Marie Winans Love known professionally as CeCe Winans (born October 8, 1964) is an American gospel singer, who has sold over 12 million records worldwide and won ten Grammy Awards. She is the best-selling female gospel artist of all time, as of 2015.
Document 9: Presenting Cissy Houston: Presenting Cissy Houston is the debut album by American soul singer/backing vocalist Cissy Houston, originally released on Major Minor Records in 1970 in the United Kingdom. Her contract was sold to Janus Records the same year. They released the album in the United States as Cissy Houston in 1970. The 2012 CD re-release on Cherry Red Records incorporates bonus tracks from later recordings.
Document 10: Aretha Franklin: Aretha Louise Franklin (born March 25, 1942) is an American singer and songwriter. Franklin began her career as a child singing gospel at the church of her father, minister C. L. Franklin's church. In 1960, at the age of 18, Franklin embarked on a secular career, recording for Columbia Records but only achieving modest success. Following her signing to Atlantic Records in 1967, Franklin achieved commercial acclaim and success with songs such as "Respect", "(You Make Me Feel Like) A Natural Woman", "Spanish Harlem" and "Think". By the end of the 1960s decade she had gained the title "The Queen of Soul".
Document 11: Diane Warren: Diane Eve Warren (born September 7, 1956) is an American songwriter. She rose to prominence in 1983, and has since written songs for and with multiple music artists, as well as for several films.
Document 12: Bobbi Kristina Brown: Bobbi Kristina Brown (March 4, 1993 – July 26, 2015) was an American reality television, media personality, and singer. She was the daughter of singers Bobby Brown and Whitney Houston. Her parents' fame kept Bobbi Kristina in the public eye, including her appearances on the reality show "Being Bobby Brown". Brown was 14 when her parents divorced and Houston gained custody. When Houston died in February 2012, Brown was named as the sole beneficiary of her mother's estate.
Document 13: Dee Dee Warwick: Delia Juanita Warrick (September 25, 1945 – October 18, 2008), known as Dee Dee Warwick, was an American soul singer. Born in Newark, New Jersey, she was the sister of Dionne Warwick, niece of Cissy Houston and the cousin of Whitney Houston.
Document 14: Nina Marie Fite: Nina Marie Fite is an American diplomat and a career member of the Senior Foreign Service. Currently serving as Principal Officer at the U.S. Consulate General in Montreal, Canada, she has been nominated by President Donald Trump to become the next United States Ambassador to Angola. Since becoming a diplomat in 1990, Fite has served at seven U.S. overseas missions. Fite's diplomatic assignments have included posts in Lahore as Consul General, in Kabul as Deputy Economic Counselor, and in Luanda as the Political/Economic Section Chief. She has also been on assignment with the Office of the United States Trade Representative.
Document 15: Diahann Carroll: Diahann Carroll ( ) (born Carol Diahann Johnson, July 17, 1935) is an American television and stage actress and singer known for her performances in some of the earliest major studio films to feature black casts, including "Carmen Jones" (1954) and "Porgy and Bess" (1959) as well as on Broadway. "Julia" (1968) was one of the first series on American television to star a black woman in a nonstereotypical role and was followed by her portrayal of Dominique Deveraux in the primetime soap opera "Dynasty" over three seasons. She is the recipient of numerous stage and screen nominations and awards, including the Golden Globe Award for "Best Actress In A Television Series" in 1968. A breast cancer survivor and activist, Carroll was scheduled to return to the Broadway stage in the 2014 revival of "A Raisin in the Sun" as Mama, but withdrew prior to opening citing the demands of the rehearsal and performance schedule.
ground_truth: the Food and Agriculture Organization