Complex sentence: Not included in the database were Niuafoʻouan and Pukapuka, both of uncertain classification but wrongly groups Tikopian with Ellicean, the only matter at variance with the comparative method of linguistics.
Split into simpler sentences: Not included in the database were Niuafoʻouan and Pukapukan, both of uncertain classification. The procedure wrongly groups Tikopian with Ellicean, the only matter at variance with the comparative method of linguistics.