Complex sentence: Dion publicly refused Félix Award for Anglophone Artist of the Year, not considering herself an Anglophone artist; the next year, the category was changed to Artist of the Year Achieving the Most Success in a Language Other Than French.
Split into simpler sentences: Dion publicly refused Félix Award for Anglophone Artist of the Year, not considering herself an Anglophone artist. The next year, the category was changed to Artist of the Year Achieving the Most Success in a Language Other Than French.