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


question:
The PBS NewsHour is an American evening television news program that is broadcast seven nights a week on more than 300 PBS stations .
answer:
The PBS NewsHour is an American daily evening television news program that is broadcast on the Public Broadcasting Service ( PBS ) , airing seven nights a week on more than 350 of the public broadcaster 's member stations .


question:
The officers of arms earn money from their own private practices in heraldry and genealogy .
answer:

In addition to their official duties , the heralds have for many centuries undertaken private practice in heraldry and genealogy , for which professional fees are charged .


