Question: What industry did cargo ships converted for hauling slaves and Sydenham Teast have in common?

full_context: Document 1: John Bull (1799 ship): John Bull was a sailing ship built in 1799 at Liverpool for the slave trade. She made one voyage carrying slaves from West Africa to Jamaica. Thereafter she became a West Indiaman, trading with Jamaica. Early in this period she was a letter of marque, and captured a French merchant vessel. A little later "John Bull" detained an American vessel. Much later she carried military prisoners to Australia from Ceylon on one voyage, and then on another transported female convicts to Australia from Cork. She was last listed in 1833.
Document 2: Adelaide Steamship Company: The Adelaide Steamship Company was formed by a group of South Australian businessmen in 1875. Their aim was to control the transport of goods between Adelaide and Melbourne and profit from the need for an efficient and comfortable passenger service. For the first 100 years of its life, the main activities of the company were conventional shipping operations on the Australian coast, primary products, consumer cargoes and extensive passenger services.
Document 3: Steamship: A steamship, often referred to as a steamer, is a vessel, typically ocean-faring and seaworthy, that is propelled by one or more steam engines that typically drive (turn) propellers or paddlewheels. The first steamships came into practical usage during the early 1800s; however, there were exceptions that came before. Steamships usually use the prefix designations of "PS" for "paddle steamer" or "SS" for "screw steamer" (using a propeller or screw). As paddle steamers became less common, "SS" is assumed by many to stand for "steam ship". Ships powered by internal combustion engines use a prefix such as "MV" for "motor vessel", so it is not correct to use "SS" for most modern vessels.
Document 4: Algol-class vehicle cargo ship: The "Algol"-class vehicle cargo ships, also known as Fast Sealift Ships (FSS) or SL-7s, are currently the fastest cargo ships in the world, capable of speeds in excess of 33 kn . Originally built in 1972 and 1973 as high-speed container ships known as SL-7's for Sea-Land Services, Inc., the ships' high operating costs limited their profitability. All eight ships were acquired by the US Navy in 1981 and 1982, with the last ship converted, recommissioned and delivered to Military Sealift Command in 1986. The conversion entailed the installation of four cranes, addition of roll on/roll off capability and a redesign of the cargo hold to better facilitate storage of vehicles. Due largely to their high cost of operation, all fast sealift ships are kept in Reduced Operating Status, but can be activated and ready to sail in 96 hours. All ships are named after bright stars in the night sky.
Document 5: Sydenham Teast: Sydenham Teast was a shipbuilder and shipowner based in Bristol, England, during the 18th and 19th centuries. Amongst Teast's businesses was whaling, and an ivory and wood trade between England and Africa. He constructed Redcliffe Parade in the 1770s, and was also involved in the slave trade, refitting the slaver "Hector" in 1776. Towards the end of the eighteenth century, Teast became a significant figure in Bristol's trade to African communities. He was not heavily invested in the slave trade
Document 6: Bristol City Line: Bristol City Line was a British shipping line based in Bristol, England that traded from 1704 until 1974. From 1760 Bristol City Line also built ships.
Document 7: Amphibious cargo ship: Amphibious cargo ships were U.S. Navy ships designed specifically to carry troops, heavy equipment and supplies in support of amphibious assaults, and to provide naval gunfire support during those assaults. A total of 108 of these ships were built between 1943 and 1945—which worked out to an average of one ship every eight days. Six additional AKAs, featuring new and improved designs, were built in later years.They were originally called Attack Cargo Ships and designated AKA. In 1969, they were renamed as Amphibious Cargo Ships and redesignated LKA.
Document 8: Blackbeard: Edward Teach or Edward Thatch (c. 1680 22 November 1718), better known as Blackbeard, was a notorious English pirate who operated around the West Indies and the eastern coast of Britain's North American colonies. Although little is known about his early life, he was probably born in Bristol, England. Recent genealogical research indicates his family moved to Jamaica where Edward Thatch, Jr. is listed as being a mariner in the Royal Navy aboard HMS "Windsor" in 1706. He may have been a sailor on privateer ships during Queen Anne's War before settling on the Bahamian island of New Providence, a base for Captain Benjamin Hornigold, whose crew Teach joined sometime around 1716. Hornigold placed him in command of a sloop he had captured, and the two engaged in numerous acts of piracy. Their numbers were boosted by the addition to their fleet of two more ships, one of which was commanded by Stede Bonnet, but toward the end of 1717 Hornigold retired from piracy, taking two vessels with him.
Document 9: Type R ship: The Type R ship is a United States Maritime Administration (MARAD) designation for World War II refrigerated cargo ship, also called a reefer ship. The R type ship was used in World War II, Korean War, Vietnam War and the Cold War. Type R ships were used to transport perishable commodities which require temperature-controlled transportation, such as fruit, meat, fish, vegetables, dairy products and other foods. The US Maritime Commission ordered 41 new refrigerated ships for the US Navy. Because of the difficulty of building refrigerated ships only two were delivered in 1944, and just 26 were delivered in 1945 and the remainder in 1946–48. The 41 R type ships were built in four groups. Two of design types were modified type C1 ships and two were modified type C2 ships. The United Fruit Company operated many of the R type ships in World War 2. The type R2-S-BV1 became the US Navy Alstede-class stores ship and the type R1-M-AV3 became the US Navy Adria-class stores ship.
Document 10: Manor of Sydenham: The Manor of Sydenham was a historic manor in Somerset, England, situated about 1/4 mile north-east of the centre of historic Bridgwater. Sydenham House, the manor house, a grade II listed building situated in the parish of Wembdon, was built in the early 16th century and refronted and rebuilt after 1613. In 1937 British Cellophane Ltd set up production and built extensive factories on 59 acres (240,000 m2) of land ("Sydenham Manor Fields") adjacent to the manor house. Production ceased in 2005 and between 2010 and 2015 the industrial site was razed to the ground. In 2015 the razed site is owned by EDF Energy, which in 2012 purchased the manor house with the former factory site, intended for construction of temporary accommodation for 1,000 workers on the proposed new Hinkley Point C nuclear power station 12 miles away. The Manor House is situated to the north side of the A39 Bath Road. Its owners were on the losing side in the Civil War and again in the Monmouth Rebellion.
Document 11: Slave ship: Slave ships were large cargo ships specially converted for the purpose of transporting slaves.
Document 12: Edward Colston: Edward Colston (2 November 1636 – 11 October 1721) was a Bristol-born English slave trader, merchant and Member of Parliament. Much of his wealth, although used often for philanthropic purposes, was acquired through the trade and exploitation of slaves. He endowed schools and almshouses and his name is commemorated in several Bristol landmarks, streets, three schools and the Colston bun.
Document 13: Malbone Castle and Estate: Malbone is one of the oldest privately owned estates in Newport, Rhode Island. Located on Malbone Road, the estate has a history dating to the mid-18th century, but the present main was built in 1848-49. The estate once served as the country residence of Colonel Godfrey Malbone (1695–1768) of Virginia and Connecticut. Colonel Malbone made his fortune as a shipping merchant and slave trader, becoming one of the wealthiest men in Newport during the 1740s through privateering and the triangle trade. Malbone had built what Dr. Alexander Hamilton called one of the finest houses he had seen in the colonies, probably to a design by noted colonial architect Richard Munday.
Document 14: Bomb vessel: A bomb vessel, bomb ship, bomb ketch, or simply bomb was a type of wooden sailing naval ship. Its primary armament was not cannons (long guns or carronades)—although bomb vessels carried a few cannons for self-defence—but mortars mounted forward near the bow and elevated to a high angle, and projecting their fire in a ballistic arc. Explosive shells (also called "bombs" at the time) or carcasses were employed rather than solid shot. Bomb vessels were specialized ships designed for bombarding (hence the name) fixed positions on land. In the 20th century, the same role was carried out by battleships, cruisers, destroyers, and the purpose-built World War I- and II-era monitors.
Document 15: William Snelgrave: William Snelgrave was an English sea captain, slave trader, and ivory trader on the West African coast. He was captured by pirate captains La Bouche, Thomas Cocklyn, and Howell Davis along the coast of West Africa in 1719. He was originally attacked by Cocklyn's quartermaster for failing to surrender. He was beaten and shot in the arm, but his men cried out "For God's sake, don't kill our captain, for we were never with a better man." Snelgrave was then spared. Snelgrave wrote about his captivity with the pirates. He described how Davis claimed that "their reasons for going a pirating were to revenge themselves on base merchants and cruel commanders of ships." This probably explains why Snelgrave was spared, despite the fact that he intended to fight the pirates.
ground_truth: slave trade