Give you a statement and table with its title in Markdown format, please determine whether the statement is supported or refuted by, or is unrelated to the table. It'a binary classification problem, you should choose the answer between supported and refuted. 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 | wã¼rttemberg | sachsen - class ironclad |
Title:
list of ship launches in 1878
Statement:
karljohansverns verft are the only builders that built a gunboat boats on the table
Answer:
supported