a brief instruction on how to use advanced search in Data Extract

It would be very nice to have a brief instruction on how to use Advanced Search in Data Extract. Currently we just have:

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Apply a Search Filter

If you apply a search here, then SiteCatalyst will only return Pages matching that search criteria.

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So if you want to use multiple words in OR and AND field, it is not clear if a comma or space should be used as a delimiter. It would be nice to have a instruction near the box so that we know what to do in the first place.