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]: A voluntary association or union is a group of individuals who voluntarily enter into an agreement to form a body ( or organization ) to work together for a purpose .
[A]: A voluntary group or union ( also sometimes called a voluntary organization , common-interest association , association , or society ) is a group of individuals who enter into an agreement , usually as volunteers , to form a body ( or organization ) to accomplish a purpose .


[Q]: Several double-blind experiments suggest that people who say they have EHS ca n't detect if electromagnetic fields are present , and are just as likely to report feeling sick after a phony exposure as they are after real exposure , making scientists think it is the nocebo effect .
[A]: Since then , several double-blind experiments have shown that people who report electromagnetic hypersensitivity are unable to detect the presence of electromagnetic fields and are as likely to report ill health following a sham exposure as they are following exposure to genuine electromagnetic fields , suggesting the cause in these cases to be the nocebo effect .


[Q]: The subsolar point on a planet is when its sun looks like it is directly overhead ( in zenith ) .
[A]:
The subsolar point on a planet is the point at which its sun is perceived to be directly overhead ( at the zenith ) ; that is , where the sun 's rays strike the planet exactly perpendicular to its surface .