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.

Spiritualism is a religious movement based on the belief that the spirits of the dead exist and have both the ability and the inclination to communicate with the living .
Spiritualism is a belief that humans can communicate with the spirits of the dead .

In 1903 , he received the Nobel Prize in Physics with his wife , Marie Skodowska-Curie , and Henri Becquerel , " in recognition of the extraordinary services they have rendered by their joint researches on the radiation phenomena discovered by Professor Henri Becquerel " .
He shared the 1903 Nobel Prize in Physics with his wife , Marie Curie and Henri Becquerel , for the work on ' spontaneous radioactivity ' which Becquerel discovered .

Belarus declared itself sovereign on 27 July 1990 by issuing the Declaration of State Sovereignty of the Belarusian Soviet Socialist Republic .
Belarus said it was free on 27 July 1990 .