Complex sentence: The Gabrieleño Band of Mission Indians have disavowed the name "Tongva" and accepted "Kizh" as the correct endonym, and have argued strongly against the use of "Tongva".
Split into simpler sentences: The Gabrieleño Band of Mission Indians have disavowed the name "Tongva" and accepted "Kizh" as the correct endonym. They have argued strongly against the use of "Tongva".