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.

J2 League is the second grouping of Japan Professional Football League ( , Nippon Puro Sakka Ri gu ) .
The J2 League ( Japanese : J2 , Hepburn : J2 Ri gu ) or simply J2 is the second division of the Japan Professional Football League ( Japanese : , Hepburn : Nihon Puro Sakka Ri gu ) and the second level of the Japanese association football league system .

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

In positive psychology , researchers are studying what gives a person satisfaction in life .
In positive psychology , social scientists study what might contribute to living a good life , or what would lead to people having increased positive mood and overall satisfaction with their life .