In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.

[Q]: Wave – particle duality is the concept in quantum mechanics that every particle or quantum entity may be partly described in terms not only of particles , but also of waves .
[A]: Wave – particle duality means that all particles show both wave and particle properties .


[Q]: The Inca Civil War , also known as the Inca Dynastic War , the Inca War of Succession , or , sometimes , the War of the Two Brothers was fought between two brothers , Hua ́ scar and Atahualpa , sons of Huayna Capac , over the succession to the throne of the Inca Empire .
[A]: It was fought between two brothers , Hua ́ scar and Atahualpa , sons of Huayna Capac , over who would be the next emperor .


[Q]: The Campeonato de Espan ̃ a – Copa de Su Majestad el Rey , commonly known as Copa del Rey or simply La Copa , is an annual knockout football competition in Spanish football , organized by the Royal Spanish Football Federation .
[A]:
The Copa del Rey is an annual football competition in Spain .