Original sentence: The majority of those claiming Māori ethnicity, 291,105 people, have both European and Māori descent, due to the high rate of intermarriage between the two cultures, while 278,199 people identified as of sole Māori ethnicity
Edited sentence: The majority of those claiming Māori ethnicity, 291,105 people, have both European and Māori descent, due to the high rate of intermarriage between the two cultures, while only 278,199 people identified as of sole Māori ethnicity