You will be given a definition of a task first, then some input of the task.
You are given the conttent of a table in the input (row by row). Generate an unambiguous question based on the information present in the table, such that: 1) It's answer is unique and is in the given table, 2) Its answer is a contiguous text span from the table. Avoid creating questions that can be answered correctly without reading/understanding the table

Table: ['', 'Country', 'Builder', 'Location', 'Ship', 'Class / type']. ['6 March', 'United States', 'John Roach and Son', 'Chester, Pennsylvania', 'City of Rio de Janeiro', 'Passenger ship']. ['13 May', 'Germany', 'Kaiserliche Werft Wilhelmshaven', 'Wilhelmshaven', 'Bayern', 'Sachsen-class ironclad']. ['13 June', 'United Kingdom', 'Royal Dockyard', 'Devonport, Devon', 'Pegasus', 'Doterel-class sloop']. ['31 August', 'United Kingdom', 'Royal Dockyard', 'Sheerness', 'Gannet', 'Doterel-class sloop']. ['23 October', 'Norway', 'Karljohansverns Verft', 'Horten', 'Nor', 'Vale-class gunboat']. ['1 November', 'Norway', 'Karljohansverns Verft', 'Horten', 'Brage', 'Vale-class gunboat']. ['9 November', 'Germany', 'A. G. Vulcan', 'Stettin', 'Wurttemberg', 'Sachsen-class ironclad']
Output:
what class is the nor?