Question: When did the operator of SS Zealandic go out of business?

full_context: Document 1: SS Cymric: SS "Cymric" was a steamship of the White Star Line built by Harland and Wolff in Belfast and launched on 12 October 1897. She had originally been designed as a combination passenger liner and livestock carrier, with accommodations for only First Class passengers. During the stages of her design layout, it became clearer to the designers at Harland and Wolff that combining passengers and livestock had become rather unpopular, so the spaces designated for cattle were reconfigured into Third Class accommodations. She departed Liverpool on her maiden voyage on 29 April 1898, arriving in New York City on 9 May 1898. She spent the first five years of her career on the White Star Line's main passenger service route between Liverpool and New York, until 1903 when she was transferred to the less traveled Liverpool-Boston route, which she sailed on for nine years before being returned to the New York route in 1912.
Document 2: SS Baltic (1871): SS "Baltic" was an ocean liner owned and operated by the White Star Line. "Baltic" was one of the first four ships ordered by White Star from shipbuilders Harland and Wolff after Thomas Ismay bought the company, and the third of the ships to be delivered.
Document 3: Williams & Guion Black Star Line: The Black Star Line was the name used by American sailing packets owned by the New York firm of Williams and Guion from 1848 to 1866. The line owned 18 ships on the Liverpool-Queenstown-New York route. The line was shut down in 1863 because of the success of newer, faster liners and the danger of transatlantic travel during the American Civil War.
Document 4: RMS Oceanic (1870): RMS "Oceanic" was the White Star Line's first liner and an important turning point in passenger liner design. Entering service in 1871 for Atlantic crossings, she was later chartered to Occidental and Oriental Steamship Company (O&O) in 1875. The ship provided passenger service for O&O in the Pacific until 1895 when she was sold for scrap.
Document 5: American Export-Isbrandtsen Lines: American Export-Isbrandtsen Lines, New York, was the leading US-flag shipping company between the U.S. east coast and the Mediterranean from 1919 to 1977, offering both cargo ship services and passenger ship services, until it declared bankruptcy and was acquired by Farrell Lines, New York.
Document 6: RMS Celtic (1901): RMS "Celtic" was an ocean liner owned by the White Star Line. The first ship larger than the in gross tonnage (it was also longer), Celtic was the first of a quartet of ships over 20,000 tons, dubbed The Big Four.
Document 7: SS Megantic: SS "Mégantic" was an ocean liner built by Harland and Wolff, of Belfast, and operated by the White Star Line. The liner was launched in 1908 and was . The ship was attacked by a German U-boat during World War I, but survived. "Mégantic" was taken out of service in 1931 and scrapped in 1933.
Document 8: SS Ionic (1883): SS "Ionic was a cargo liner initially in service with White Star Line from 1883 until 1900. She was used on the company's joint route to New Zealand with the Shaw, Savill & Albion Line. She was sold to the Aberdeen Line in 1900 and renamed SS "Sophocles, and was withdrawn for service in 1906 and scrapped in 1908.
Document 9: SS Britannic (1874): "Britannic" was a single-screw passenger steamship equipped with sails built for the White Star Line's North Atlantic run. It was initially to be called "Hellenic", but, just prior to her launch, her name was changed to "Britannic". Together with her sister "Germanic", "Britannic" sailed for nearly thirty years, primarily carrying immigrant passengers on the highly trafficked Liverpool to New York City route. In 1876 it received the Blue Riband, both westbound and eastbound, by averaging almost .
Document 10: SS Vedic: SS "Vedic" was an ocean liner for the White Star Line, built in 1917 by Harland and Wolff. She was requisitioned as a troopship in World War One, for which she was extensively refitted.
Document 11: Oceanic (unfinished ship): The RMMV "Oceanic" (Royal Mail Motor Vessel) was the planned name of an unfinished ocean liner that was partially built by Harland and Wolff for the White Star Line. The ship was to have been the first -long ocean liner. It was intended to be the largest ocean liner for the White Star Line, thus it would have been larger than the earlier White Star giants, "Olympic", "Titanic", "Britannic", and "Majestic."
Document 12: SS Zealandic (1911): SS "Zealandic" was a British ocean liner initially operated by White Star Line. She was used both as a passenger liner and a cargo ship as well as serving during both world wars.
Document 13: Saint Helena: From 1958, the Union Castle shipping line gradually reduced its service calls to the island. Curnow Shipping, based in Avonmouth, replaced the Union-Castle Line mailship service in 1977, using the RMS (Royal Mail Ship) St Helena.
Document 14: SS Arabic (1902): SS "Arabic" was a British-registered ocean liner that entered service in 1903 for the White Star Line. She was sunk on 19 August 1915, during the First World War, by German submarine , south of Kinsale, causing a diplomatic incident.
Document 15: White Star Line: White Star Line Former type Partnership Industry Shipping, transportation Fate merged with Cunard Line Successor Cunard White Star Line Founded 1845 (1845) in Liverpool, England Defunct 1934 Area served Transatlantic Parent Ismay, Imrie and Co. Website www.cunard.co.uk
ground_truth: 1934
sub_queries: SS Zealandic >> operator Answer: White Star Line
when did White Star Line go out of business Answer: 1934