Question: More than likely, what type of people were held captive for slave labor at the Ducros Plantation?

Context paragraphs:
Task system: The task system is a system of labor under slavery characteristic in the Americas.  It is usually regarded as less brutal than other forms of slave labor.  The other form, known as the gang system, was harsher.  Under this system, each slave is assigned a specific task to complete for the day.  After that task is finished, the slave is then free to do as he or she wishes with the remaining time.  The gang systems forced the slaves to work until the owner said they were finished and allowed them almost no freedom.  Whether plantation owners organized their slaves on the task or gang system had much to do with the type of crops they harvested.  Tobacco and sugar cultivation was organized into gangs since those crops required considerable processing and supervision.  Coffee, rice, and pimento were comparatively hardier plants where extensive supervision was unnecessary, leading planters to favor the task system on their plantations.

The Wretch: The Wretch is a comic book created by Phil Hester and published by Slave Labor Graphics.  The series focuses on the creepy town of Glass City and its residents who are protected by a strange entity known only as the Wretch.  Weird things can always be found in Glass City, such as aliens, black magic, and even psychotic clowns.  But the Wretch is always there to stop these things.  The Wretch originally appeared in Joe Pruett's anthology title Negative Burn, where he was called "The Creep."  The Wretch then moved into his own four-issue series published by Caliber Comics, which was followed by a six-issue series published by Slave Labor Graphics.  The Caliber series was nominated for an Eisner award for best new series.

Prairie View (Pleasant Green, Missouri): Prairie View, also known as the Betteridge Property and Crestmead, is a historic plantation house located at Pleasant Green, Cooper County, Missouri.  It was built in 1859 by John Taylor, and is a two-story, Italianate/Greek Revival style frame dwelling with a 1 1/2-story rear ell.  It features a single story porch with fluted Doric order columns and paired brackets in the eaves.  It is notable for its contribution to local commerce and agriculture of the region.  The plantation utilized slave labor from the time of its completion until the end of the Civil War.  The Prairie View plantation is a private residence and the current owners are Robert and Ann Betteridge.  The Betteridge family have owned Prairie View since 1903 when Robert Betteridge's grandfather William Betteridge bought the house and legally changed the name from Prairie View to Crestmead.

Morrison Plantation Smokehouse: The Morrison Plantation Smokehouse is a historic plantation outbuilding in rural Hot Spring County, Arkansas.  Located off County Road 15 near Saginaw, it is the last surviving remnant of a once-extensive plantation property.  It is a hexagonal structure, built out of dry laid fieldstone, and capped with a hip roof that has a gabled venting cupola at the top.  It was built about 1854, probably by slave labor, on the plantation of Daniel Morrison.

Joseph Pitts (author): Joseph Pitts (1663–1735?)  was an Englishman who was taken into slavery by Barbary pirates from Algeria in 1678 at the age of fourteen or fifteen.  Little is known about Pitts aside from what is revealed in his narrative concerning his time held captive in Northern Africa, during which time he went through three masters ranging widely in their cruelty towards him over the course of more than fifteen years, with whom he travelled to Cairo and Alexandria.  Though he escaped between the years 1693 and 1694, it was not until 1704 that Pitts first published his account.  Pitts's "A True and Faithful Account of the Religion and Manners of the Mohammetans, with an Account of the Author's Being Taken Captive" includes descriptions of his capture and captivity, including some of the first English descriptions of Islamic rituals.  Converting to the religion while a slave, Pitts was the first Englishman to record the proceedings of the hajj, one of the five pillars of Islam.  Pitts also describes the people of seventeenth-century North Africa (whom he calls Turks or Mohammetans) in detail, providing particulars on their manner of eating and dressing, the customs of their religion and marriage, and their economic and slave systems.  Though its accuracy is debatable, Pitts’s narrative was the first and most detailed description of the religion of Islam and the manners of Muslims written by a European during the seventeenth century.

Oddjob (comics): Oddjob is a comic book series published by Slave Labor Graphics and created by Ian Smith and Tyson Smith, featuring Moe, Investigator of the Odd.  The comic is an action/humor series with absurdist tendencies.  "Oddjob" was published in bimonthly from Spring 1999-May 2001.  All eight issues (and an additional story) were collected in a trade paperback by Slave Labor in 2003.

Avraham Shifrin: Avraham Shifrin (Belarusian: Аўраам Ісакавіч Шыфрын ; Yiddish: שיפרין אברהם; Russian: Авраам Исаакович Шифрин, Avraam Shifrin; born on October 8, 1923 in Minsk, USSR, died on March 5, 1998 in Jerusalem) was a Soviet-born human rights activist, Zionist, author, lawyer, and Israeli politician who spent a decade in Soviet prisons for allegedly spying for the US and Israel.  Avraham Shifrin was one of the world’s top authorities on the Soviet system of prisons and slave labor camps.  Shifrin's testimonies before Internal Security Subcommittee of the Senate and other congressional committee (House Banking and Currency Committee, 1973), provided the world with the major listing of Soviet slave labor camps.

Ducros Plantation: The Ducros Plantation (a.k.a. Old Jackson Plantation or Polmer Plantation) is a Southern plantation located in Schriever, Louisiana.

Old House Plantation: Old House Plantation, also known as Daniel Heyward Plantation, is a historic plantation site and grave located near Ridgeland, Jasper County, South Carolina.  The plantation was first settled in 1743 and was likely active through the first quarter of the 19th century.  It was the birthplace and burial site of Thomas Heyward, Jr., one of South Carolina’s four signers of the Declaration of Independence.  The plantation site includes a variety of plantation structures including the main house, two probable flanking outbuildings (one of which is likely a kitchen), a tidal mill, stable and likely slave quarters.  Associated with the plantation is the Heyward family cemetery and surrounding brick wall.

Plantations in the American South: Plantations were an important aspect of the history of the American South, particularly the antebellum (pre-American Civil War) era.  The mild subtropical climate, plentiful rainfall, and fertile soils of the American Southeast allowed large plantations to flourish; where large numbers of workers, usually Africans held captive for slave labor, were required for agricultural production.

Supporting paragraphs: Ducros Plantation Plantations in the American South
Answer: Africans