Table:
text: Norwegian America Line
Passenger ships
Passenger ships
Ship Built In_service_for_NAL Type_ Tonnage
SSKristianiafjord 1913 1913–17 ocean liner GRT
SSBergensfjord 1913 1913–40 ocean liner GRT
SSStavangerfjord 1917 1917–40 1945–64 ocean liner GRT
MSOslofjord(1938) 1938 1938–40 ocean liner GRT
MSOslofjord(1949) 1949 1949–67 ocean liner GRT
MSBergensfjord 1956 1956–71 ocean liner GRT
MSSagafjord 1965 1965–83 ocean liner / cruise ship GRT
MS Vistafjord 1973 1973–83 cruise ship GRT

Question: What does the ship MS Vistafjord do for Norwegian America Line (NAL)?

Question: What is the tonnage of the pre-1973 Norwegian America Line ship SSBergensfjord?