Question: Which British shipping line has a full title incorporating Boston Packers, and operated the SS Justicia?

full_context: Document 1: Cunard-White Star Line: Cunard White Star Line, Ltd., was a British shipping line which existed between 1934 and 1949, It was created as an operating company to control the joint shipping assets of the Cunard Line and the White Star Line after both companies experienced financial difficulties during the Great Depression. Cunard White Star controlled a total of twenty-five large ocean liners (with Cunard contributing fifteen ships and White Star ten). Both Cunard and White Star were in dire financial trouble, and were looking to complete enormous liners: White Star had Hull 844 – RMS "Oceanic III" – and Cunard had Hull 534, which would later become  .
Document 2: RMS Laconia (1921): The second RMS "Laconia" was a Cunard ocean liner, built by Swan, Hunter & Wigham Richardson as a successor of the 1911-1917 "Laconia". The new ship was launched on 9 April 1921, and made her maiden voyage on 25 May 1922 from Southampton to New York City. At the outbreak of World War II she was converted into an Armed Merchant Cruiser, and subsequently a troopship. Like her predecessor, sunk during the First World War, this "Laconia" was also destroyed by a German submarine. Some estimates of the death toll have suggested that over 1,649 people were killed when the "Laconia" sank. The U-boat commander Werner Hartenstein then staged a dramatic effort to rescue the passengers and the crew of "Laconia", which involved additional German U-boats and became known as the Laconia incident.
Document 3: Inman Line: The Inman Line was one of the three largest 19th-century British passenger shipping companies on the North Atlantic, along with the White Star Line and Cunard Line. Founded in 1850, it was absorbed in 1893 into American Line. The firm's formal name for much of its history was the Liverpool, Philadelphia and New York Steamship Company, but it was also variously known as the Liverpool and Philadelphia Steamship Company, as Inman Steamship Company, Limited, and, in the last few years before absorption, as the Inman and International Steamship Company.
Document 4: White Star Line: The Oceanic Steam Navigation Company or White Star Line of Boston Packers, more commonly known as just White Star Line, was a prominent British shipping company.
Document 5: RMS Republic (1903): RMS Republic was a steam-powered ocean liner built in 1903 by Harland and Wolff in Belfast, and lost at sea in a collision six years later while sailing for the White Star Line. A CQD distress call was issued on the new Marconi radio device, the first recorded, resulting in the saving of around 1500 lives. Known as the "Millionaires' Ship" on account of the number of well-known and immensely rich Americans who traveled by her, she was described as a "palatial liner" and was the flagship of White Star Line's Boston service.
Document 6: SS Traffic (1911): SS "Traffic" was a tender of the White Star Line, and the fleetmate to the SS "Nomadic". She was built for the White Star Line by Harland and Wolff, at Belfast, to serve the luxury "Olympic"-class ocean liners. SS "Traffic" ferried some of the third class passengers to  for her maiden voyage. She served as a tender for White Star, as a minesweeper for the French Navy between 1917 and 1919, and supported troop ships at the end of the First World War. After the war she was sold to Société Cherbourgeoise Transbordement, and later renamed "Ingénieur Reibell". She was scuttled by the French as the Germans invaded in 1940, but was salvaged and used by the Germans as an armed coastal vessel until being sunk by the Royal Navy on 17 January 1941.
Document 7: RMS Homeric (1913): RMS "Homeric", originally launched as "Columbus", was built for Norddeutscher Lloyd and launched in 1913 at the F. Schichau yard in Danzig. "Columbus" was ceded to Great Britain in 1919 as part of German war reparations. She was sold to White Star Line in 1920, which named her "Homeric". Her sister ship "Hindenburg" retained her German ownership and was renamed "Columbus". "Homeric" was operated by White Star from 1922 to 1935.
Document 8: HMS Statice (K281): When the United States entered World War II at the end of 1941, the United States Navy found itself deficient in ocean escort-type vessels. A crash building program was instituted; but, to meet more immediate needs, the government contracted with shipbuilding firms in England and Canada to build Flower-class corvette . Vim" (PG-99) was one of those British-type escorts. She was launched on 1 April 1943 at the Collingwood Shipyard in Collingwood, Ontario. Nine days later, however, she was transferred to the Royal Navy under the terms of the lend-lease agreement in return for another Flower-class corvette then under construction in Canada. The British renamed her HMS "Statice, and she served the Royal Navy under the name through World War II. On 21 June 1946, she was returned to the United States Navy. Though carried on the Navy list as PG-99, the corvette never saw active service with the United States Navy. She was sold on 7 May 1947. To whom she was sold and to what purpose she was put is unknown.
Document 9: Ocean Steam Navigation Company: The Ocean Steam Navigation Company (OSNC or Bremen Line) was a shipping company founded in 1847 in New York City by Edward Mills. It was the first company to be awarded a contract by the US government for the oceanic transportation of mail. In addition to the US contract, the company was partially subsidized by the Prussian government with the intention of increasing trade with the US out of the port of Bremen, hence the name Bremen Line. The line began operations in June 1847 with the steamship "Washington", which completed her first eastbound voyage on June 15 and was joined by a sister ship, "Hermann". Both vessels were slower than those operated by the Cunard Line, and the government revoked its contract with Oceanic by the end of 1847; it was later awarded to the Collins Line."Washington" and "Hermann" both suffered mechanical difficulties, and Mills parted ways acrimoniously with the company—after giving control to investors but staying on as a manager, he tried to begin a competing line and was then fired from Oceanic. Both the company's vessels rebuilt with improved propulsion systems in the early 1850s, but they remained slower than the competition. After a brief upturn in business in 1855 when Cunard ships were chartered by the British government to serve in the Crimean War, competition returned to the North Atlantic the following year, as Cunard resumed service and German companies Hamburg America Line and Norddeutscher Lloyd began transatlantic crossings from German ports. In July 1857, after losing its remaining US mail contract for traffic to Germany, Oceanic ceased operations.
Document 10: Black Star Line: The Black Star Line (1919−1922) was a shipping line incorporated by Marcus Garvey, the organizer of the Universal Negro Improvement Association (UNIA), and other members of the UNIA. The shipping line was created to facilitate the transportation of goods and eventually African Americans throughout the African global economy. It derived its name from the White Star Line, a line whose success Garvey felt he could duplicate. Black Star Line became a key part of Garvey's contribution to the Back-to-Africa movement. It was one among many businesses which the UNIA originated, such as the Universal Printing House, Negro Factories Corporation, and the widely distributed and highly successful "Negro World" weekly newspaper.
Document 11: Olympic-class ocean liner: The "Olympic"-class ocean liners were a trio of British ocean liners built by the Harland & Wolff shipyard for the White Star Line during the early 20th century. They were "Olympic" (1911), "Titanic" (1912), and "Britannic" (1915). All three were designed to be the largest and most luxurious passenger ships in the world, designed to give White Star an advantage in the transatlantic passenger trade. Two were lost early in their careers: "Titanic" sank in 1912 on its maiden voyage, after hitting an iceberg in the North Atlantic Ocean, and "Britannic" in 1916, after hitting a mine laid by the minelayer submarine "U-73" in a barrier off Kea in the Aegean Sea during World War I. "Olympic", the lead vessel, had a career spanning 24 years and was retired in 1934 and sold for scrapping in 1935.
Document 12: SS Nomadic (1911): SS "Nomadic" is a former tender of the White Star Line, launched on 25 April 1911 in Belfast now on display in Belfast's Titanic Quarter. She was built to transfer passengers and mail to and from RMS "Olympic" and RMS "Titanic", and is the only White Star Line vessel in existence today.
Document 13: SS Justicia: SS "Justicia was a British troopship sunk during the First World War. She was laid down as SS "Statendam, a 32,234 gross-ton ocean liner built for the Holland America Line by Harland and Wolff in Belfast. Before the ship was completed she was acquired by the British government and operated on behalf of the shipping controller by the White Star Line.
Document 14: J. Bruce Ismay: Joseph Bruce Ismay ( ; 12 December 1862 – 17 October 1937) was an English businessman who served as chairman and managing director of the White Star Line. In 1912 he came to international attention as the highest-ranking White Star official to survive the sinking of the company's brand new flagship RMS "Titanic", for which he was subject to severe criticism.
Document 15: Atlantic Transport Line: The Atlantic Transport Line was an American passenger shipping line based in Baltimore, Maryland. In 1901 the company was folded into the International Mercantile Marine shipping trust (IMM). The line developed with railroad support as an offshoot of Bernard N. Baker's Baltimore Storage and Lighterage Company in 1881. Although American owned, the Atlantic Transport Line operated from Britain, with British registered and manned vessels, most of which were British built. General cargo, live cattle and small numbers of passengers were carried from Baltimore and Philadelphia to British ports and the line developed an excellent reputation for shipping valuable horses. A full-scale weekly passenger service between New York and London commenced in 1892 and today the line is best remembered for its exclusively first class direct London to New York passenger/cargo service operated by its four Minne class ships, SS "Minneapolis", SS "Minnehaha", SS "Minnetonka" and SS "Minnewaska" from 1900 to 1915.
ground_truth: White Star Line