Complex sentence: She died in 1598: she chose not to be buried with any of her husbands but in a tomb of her own under the title Lady Dunsany, a decision which confirms her reputation as a woman of exceptional independence and strength of character.
Split into simpler sentences: She died in 1598 and chose not to be buried with any of her husbands but in a tomb of her own. She was buried under the title Lady Dunsany, a decision which confirms her reputation as a woman of exceptional independence and strength of character.