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


question:
The Central Bohemian Region is an administrative unit of the Czech Republic , located in the central part of its historical region of Bohemia .
answer:
The Central Bohemian Region is a region of the Czech Republic .


question:
After his mother 's death , when he was seven years old , he lived with his uncle and grandmother in the German financial capital of Frankfurt am Main ( " Frankfurt on the Main River " ) .
answer:

His mother died when he was seven , and he went live with his uncle and grandmother in Frankfurt .