Question:
Johnny Burnette was born to Willie May and Dorsey Burnett Sr. in Memphis, Tennessee. (The "e" at the end of his name was added later.) Johnny grew up with his parents and Dorsey Jr. in a public housing project in the Lauderdale Courts area of Memphis, which from 1948 until 1954 was also the home of Gladys and Vernon Presley and their son, Elvis.
In 1952, the Burnette brothers and Burlison formed a group called the Rhythm Rangers. Johnny sang and played acoustic guitar, Dorsey played bass and Paul Burlison played lead guitar. For economic reasons, the three moved to New York in 1956 and managed to get an audition for Ted Mack's Original Amateur Hour. Winning the competition three times in a row gained them a place in the finals and a recording contract with Coral Records, and they renamed themselves the Rock and Roll Trio. They also gained a manager, the bandleader Henry Jerome, and a drummer, Tony Austin (a cousin of Carl Perkins).  Promotional appearances were arranged on Dick Clark's American Bandstand, Steve Allen's Tonight Show and Perry Como's Kraft Music Hall, together with a summer tour with Carl Perkins and Gene Vincent. On Sunday September 9, 1956, they appeared as finalists in the Original Amateur Hour at Madison Square Garden. Despite this activity, the three singles they released over this period failed to make the national charts.  In order to cover their living expenses, the Trio was forced to go on the road, for what seemed to be an endless stream of one-night stands. This exhausting regime led to squabbles, which were exacerbated in Dorsey's case by Jerome's use of the name Johnny Burnette and the Rock and Roll Trio on records and live dates. Things finally came to a head at a gig in Niagara Falls in autumn 1956, when, as a result of a fight, Dorsey quit the group a week before they were to appear in Alan Freed's film Rock, Rock, Rock.  Johnny Black, the brother of Elvis's bassist Bill Black, was rapidly recruited to fill Dorsey's place. Despite the film appearance and three more single releases and one LP release, the group failed to achieve any chart success. The Rock and Roll Trio disbanded in autumn 1957.
Answer this question using a quote from the text above:

what was the name of the group they formed?

Answer:
Rhythm Rangers.

Answer the question at the end by quoting:

Francis Piol Bol Bok (born February 1979), a Dinka tribesman and native of South Sudan, was a slave for ten years but is now an abolitionist and author living in the United States. On May 15, 1986, he was captured and enslaved at the age of seven during an Arab militia raid on the village of Nyamlel in South Sudan during the Second Sudanese Civil War. Bok lived in bondage for ten years before escaping imprisonment in Kurdufan, Sudan, followed by a journey to the United States by way of Cairo, Egypt. Bok was aided by people of diverse cultures and faiths in his journey to freedom.
Seven-year-old Bok was captured by Giemma, a member of the slave hunting militia, who forced him to join a caravan of slaves, stolen produce, livestock and wares that the militia had captured in their raid of the Dinka settlement. When the members of the militia split up to return to their homes, Bok was taken by Giemma. Upon arriving at Giemma's residence, Francis was beaten by his captor's children with sticks and was called abeed. The word literally means "slave" and the stereotype is that of an inferior, demeaned, Negroid race. Francis was given quarters in a hovel near the pens of Giemma's livestock.  Bok began a ten-year period of slavery at the hands of Giemma and his son Hamid. He was forced to tend the family's herds of livestock. He had to take them to pastures in the area and to local watering holes, where he saw other Dinka boys who were also forced to tend herds of livestock. He began to suspect that his life was going to change forever and that his father was not going to be able to save him. His attempts to speak to the other Dinka boys were futile, as they were speaking Arabic, which he could not understand; they also seemed afraid to speak to him.  According to Bok, as he grew older, Giemma and Hamid began to place more trust in his abilities as a herdsman. Care of the cattle, horses and camels was passed to Bok and he was able to spend more time alone with the animals. Previously he had been under the careful supervision of Hamid and sometimes Giemma. In addition to having him serve as his slave, Giemma forced Francis to convert to Islam and to take the Arabic name of Abdul Rahman, meaning "servant of the compassionate one." In his autobiography, Francis states that although he was forced to convert to Islam, that he never stopped praying to God for strength to get him through his ordeal.  Bok tried twice to flee from slavery at the age of 14. The first instance happened early one morning after he had been sent out with the cattle. Bok blindly ran down a road for several miles before he was captured by one of Giemma's fellow militia members. Giemma's peer returned Francis to the Giemma's compound, where he was beaten with a bullwhip. Bok attempted to escape once again just two days later, when he fled in the opposite direction of his previous escape. He once again fled for several miles, this time keeping to the forest. He stopped for water at a local stream crossing, where he was spotted by Giemma who happened to be there as well. Giemma forced Francis back to his home, this time promising to kill him. Francis was beaten again, but Giemma chose not to kill him, as Francis had become too valuable to the family as a slave.

What happened to him after his capture?
who forced him to join a caravan of slaves, stolen produce, livestock and wares that the militia had captured in their raid of the Dinka settlement.