Complex sentence: If the four stanzas are not recited properly, they have to start the poem all over again until they get it right before they could continue with Detour, a choice between Yukon Supply Run or Klondike Gold Rush.
Split into simpler sentences: If the four stanzas are not recited properly, they have to start the poem all over again until they get it right. For the Detour, teams chose between Yukon Supply Run or Klondike Gold Rush.