TASK DEFINITION: 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.
PROBLEM: The nuclear envelope , also known as the nuclear membrane , is made up of two lipid bilayer membranes which in eukaryotic cells surrounds the nucleus , which encases the genetic material .

SOLUTION: It is a double lipid bilayer membrane which surrounds the chromosomes and nucleolus in eukaryotic cells .

PROBLEM: There may be several minimum spanning trees of the same weight ; in particular , if all the edge weights of a given graph are the same , then every spanning tree of that graph is minimum .

SOLUTION: In a graph where all the edges have the same weight , every tree is a minimum spanning tree .

PROBLEM: The Mayor of Toronto is the chief executive officer for the city of Toronto and the leader of its municipal government The mayor is elected every four years alongside Toronto City Council .

SOLUTION:
The mayor is directly-elected in municipal elections every four years alongside Toronto City Council .