Complex sentence: His successor, Kau’ulufonuafekai I sought the assasinators all the way to Futuna in which they where brought back to Tonga and knocking out their teeth, they had to chew the kava root for the Tu'i Tonga to drink.
Split into simpler sentences: His successor, Kau’ulufonuafekai I sought the killers all the way to Futuna. They where brought back to Tonga and, after having their teeth knocked out, they had to chew the kava root for the Tu'i Tonga to drink.