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.

In marine sediments the biological production of methane , also termed methanogenesis , is generally confined to where sulfates are depleted , below the top layers .
In marine sediments methane is produced when sulfates are low .

Bristol Airport , at Lulsgate Bottom in North Somerset , is the commercial airport serving the city of Bristol , England , and the surrounding area .
Bristol Airport , is in Lulsgate Bottom in North Somerset .

The Premier of the State Council of the People 's Republic of China , sometimes also referred to informally as the " Prime Minister " , is the Leader of the State Council of China ( a.k.a. the Central People 's Government ) , who is the head of government and holds the highest rank ( Level 1 ) in the Civil Service .

The Premier of China , officially " Premier of the State Council of the People 's Republic of China " , is the leader of the State Council of China , who is the head of government and holds the highest rank ( Level 1 ) in the Civil Service .