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I want to clarify something that I think would help to better answer the question. Is this showing in the meta description in the source code on the pages or is it just showing up in Google's search results? If it's in the source code then you obviously can change it, although it may be somewhat difficult depending on the cms. If it's only in search results and not in the source code then it's going to be a lot more difficult to get rid of. This is something that Google is detecting on your site and automatically displaying because it think that it's beneficial to searchers.