How to exclude ad from html class

Hello! I have been looking for some time how to solve this issue but I can’t seem to find it. I have a set of three ads that I insert every %6 paragraphs.

However, it also appears in the author box at the end of the article (I have included an URL). The html class of the author box is .saboxplugin-wrap but I don’t find how to exclude it from the ad insertion.

Could a charitable soul help me figure this out? 😀

Thanks!

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