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.

Input: Consider Input: A federation ( also known as a federal state ) is a political entity characterized by a union of partially self-governing provinces , states , or other regions under a central federal government ( federalism ) .

Output: A federation is a union of a number of self-governing states or regions , which are joined together under a central government .

Input: Consider Input: The fragments are also sometimes described collectively as the " Cairo Annals Stone " , although the term " Cairo Stone " is also used to mean only those fragments of the Royal Annals now in Cairo .

Output: The name " Cairo Stone " is also used to mean only those pieces kept in Cairo .

Input: Consider Input: A clonewheel organ is an electronic musical instrument that emulates ( or " clones " ) the sound of the electromechanical tonewheel-based organs formerly manufactured by Hammond from the 1930s to the 1970s .
Output: A clonewheel organ is an electronic musical instrument that copies the sound of the Hammond organ .