Complex sentence: Ngātoro-i-rangi was tricked onto the Te Arawa waka by the chief Tama-te-kapua as it was considered good luck to have him aboard, as he was originally destined to travel aboard the Tainui waka.
Split into simpler sentences: Ngātoro-i-rangi was tricked onto the Te Arawa waka by the chief Tama-te-kapua as it was considered good luck to have him aboard. He was originally destined to travel aboard the Tainui waka.