Question: What British ocean liner gave Leonhard Frank a reason to slap a Berlin journalist in the face?

Context paragraphs:
SS Ceramic: SS "Ceramic" was a British ocean liner built in Belfast for White Star Line in 1912–13 and operated on the Liverpool – Australia route.  "Ceramic" was the largest ship serving the route until P&O introduced  in 1923.  In 1934 Shaw, Savill & Albion Line took over White Star's Australia route and acquired "Ceramic".  The liner served as a troopship in both World Wars.  She was sunk by a German submarine in 1942, leaving only one survivor from the 656 people aboard.

SS Chusan: The SS Chusan was a British ocean liner and cruise ship, built for the Peninsular and Oriental Steam Navigation Company (P&O)'s Indian and Far East Service in 1950.  She was named after Chusan, a small island off China.  A smaller version of the SS Himalaya, the "Chusan" had a gross register tonnage of 24,215; and a capacity of 1,565 passengers and crew.  She was built as a replacement for the ship RMS Viceroy of India, lost in the Second World War.  She was 646.5 ft long.  The Chusan is said to have brought new standards of shipboard luxury to India and the Far East.  She was the last passenger liner built for P & O by Vickers-Armstrongs.

Four funnel liner: A four funnel liner, four funnelled liner or four stacker is an ocean liner with four funnels.  The SS "Great Eastern", launched on 31 January 1858 (a full 40 years ahead of any comparable ships), was the only ocean liner to sport five funnels.  As one funnel was later removed, the "Great Eastern", by default, became the first ocean liner to have four funnels.  However, after the Great Eastern became a four funnel ship she never carried passengers so really should not be considered the first four funnel liner.  The SS "Kaiser Wilhelm der Grosse", launched on 4 May 1897, was properly the first ocean liner to have four funnels and was one of the first of the golden era of ocean liners that became prominent in the early- to mid-20th century.  The most famous four funnel liners are the RMS "Titanic", which sank after striking an iceberg on her maiden voyage on 14 April 1912, and the RMS "Lusitania", which was torpedoed on 7 May 1915 during the First World War.

Escal'Atlantic: Escal'Atlantic, is a museum that explores the historic ocean liner experience in Saint-Nazaire, France.  The museum is found inside the former German World War II submarine pen in the harbour of the city port.  It tells the history of the ocean liner, allowing the visitor to wander the insides of an “ocean liner” from the past by visiting areas of a vessel and by means of artefacts.

Oceanic (unfinished ship): The RMMV (Royal Mail Motor Vessel) Oceanic 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 1000 ft -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".

SS City of Berlin: City of Berlin was a British ocean liner that won the Blue Riband for the Inman Line in 1875 as the fastest liner on the Atlantic.  She was also the largest passenger ship for six years except for the inactive "Great Eastern" Built by Caird & Company in Scotland, "City of Berlin" was the Inman Line's premier unit for thirteen years until "City of New York was commissioned in 1888.  She served the Inman Line until 1893 when Inman was merged into the American Line, and she was operated by her new owners on both the American Line and Red Star Line until 1898.  She was sold to the U.S. Government, and was in their service until after World War I.

RMS Amazon (1906): RMS "Amazon" was a British ocean liner that was torpedoed and sunk by U-"110" in the Atlantic Ocean 30 miles North by West off Malin Head, Ireland , while she was travelling from Liverpool, United Kingdom to Brazil.

RMS Lusitania: RMS "Lusitania" was a British ocean liner that a German submarine sank in World War I, causing a major diplomatic uproar.  The ship was a holder of the Blue Riband, and briefly the world's largest passenger ship until the completion of her sister ship "Mauretania" .  The Cunard Line launched "Lusitania" in 1906, at a time of fierce competition for the North Atlantic trade.  She made a total of 202 trans-Atlantic crossings.

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.

Leonhard Frank: Leonhard Frank (4 September 1882 in Würzburg – 18 August 1961 in Munich) was a German expressionist writer.  He studied painting and graphic art in Munich, and gained acclaim with his first novel "The Robber Band" (1914, tr.  1928).  When a Berlin journalist celebrated in a famous café about news of the loss of the ship RMS Lusitania, torpedoed by a German submarine, Frank was upset – and slapped the man in his face.  That is why he went into exile in Switzerland (1915–18), where he wrote a series of pacifist short-stories published under the title "Man is Good".  He returned to Germany, but after the Nazis gained power in 1933 Frank had to emigrate a second time.  He lived in Switzerland again, moved to London, then Paris and finally fled under adventurous conditions to the United States in 1940, returning to Munich in 1950.  His best-known novels were "In the Last Coach" (1925, tr.  1935) and "Carl and Anna", which he dramatized in 1929.  In 1947 MGM made a movie titled "Desire Me" out of this story.

Supporting paragraphs: Leonhard Frank RMS Lusitania
Answer: RMS Lusitania