Karen Christophersen marriage and emigration

I'm looking for the marriage record of Karen Christophersen. Karen was born Dec 16, 1854 (record #5 right hand column) http://www.arkivverket.no/URN:kb_read?idx_kildeid=1495&idx_id=1495&uid=ny&idx_side=-8 Three of Karen's siblings were married in Vang/Vang. She married a John Anderson. They came to America (Wisconsin) around 1881/1882 and brought with them a nephew Ole Andersen. I did find a record that looked close for Ole dated 4/11/1882. Age is right and the Bustad - Sinderdeie, O. but couldn't find a reference to John and Karen. Ole was born April 23 1866 record #32 http://www.arkivverket.no/URN:kb_read?idx_kildeid=8841&idx_id=8841&idx_listetype=dp&idx_kjonn=&uid=ny&idx_side=-135