Complex sentence: Williams is a soprano with a four-octave range, including the whistle register, and is noted for her acrobatic singing style with vocal qualities described as lithe and versatile, whilst also possessing a slight country twang in some of her works.
Split into simpler sentences: Williams is a soprano with a four-octave range, including the whistle register, and is noted for her acrobatic singing style with vocal qualities described as lithe and versatile. She also possessing a slight country twang in some of her works.