In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

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


[Q]: The President of Ecuador is the chief of state and the head of government in the country .
[A]: The President of Ecuador officially called the President of the Republic of Ecuador serves as both the head of state and head of government of Ecuador , is the highest political office in the country as the head of the executive branch of government .


[Q]: WrestleMania XXX was a professional wrestling pay-per-view ( PPV ) event made by WWE .
[A]:
WrestleMania XXX ( also written as WrestleMania 30 ) was the 30th annual WrestleMania professional wrestling pay-per-view event and WWE Network event produced by WWE .