Looking for in-depth case study/research about the impact of semantic HTML on SEO earn by blogging adsense income

As stated on title, I've tried to look for in-depth research (backed up with reliable data) about the impact of semantic HTML (nav, article, aside, section and other semantic tags) to the SEO effort.

Have tried to search it over google but the best I can get is this one: www.searchenginejournal.com/how-much-does-semantic-html-structure-matter-for-seo/7991/

submitted by /u/ykevin
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