Where to find code

where can i Find this code

<div class=" bd-content-6">
<div class=" bd-blog-3 " itemscope itemtype="https://schema.org/Article" > 

I need to remove it from my pages. I have searched all pages in the template folder without success. What I see is

<div class=" bd-content-6">
    <?php
            $document = JFactory::getDocument();
            echo $document->view->renderSystemMessages();
    $document->view->componentWrapper('blog_3');
    echo '<jdoc:include type="component" />';
    ?>
</div>

How do i edit what is rendered to produce the Itemscope itemtype This is urgent