Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Country | Builder | Location | Ship | Class / type |
| --- | --- | --- | --- | --- |
| United States | John Roach and Son | Chester, Pennsylvania | City of Rio de Janeiro | Passenger ship |
| Germany | Kaiserliche Werft Wilhelmshaven | Wilhelmshaven | Bayern | Sachsen-class ironclad |
| United Kingdom | Royal Dockyard | Devonport, Devon | Pegasus | Doterel-class sloop |
| United Kingdom | Royal Dockyard | Sheerness | Gannet | Doterel-class sloop |
| Norway | Karljohansverns Verft | Horten | Nor | Vale-class gunboat |
| Norway | Karljohansverns Verft | Horten | Brage | Vale-class gunboat |
| Germany | A. G. Vulcan | Stettin | Württemberg | Sachsen-class ironclad |
Question:
Who was the builder of Nor?
Answer:
Karljohansverns Verft