1. cd {WEBSITE_FOLDER}
2. grep -iRl "data-vocabulary.org" ./
   
    
3. ./sites/all/modules/path_breadcrumbs/path_breadcrumbs.module

<?php

/**
 * @file
 * Provide core functions for path breadcrumbs module.
 */

require_once 'path_breadcrumbs.info.inc';

/**
 * Define module constants.
 */

// Constants for rich snippets support.
define('PATH_BREADCRUMBS_RICH_SNIPPETS_DISABLED', 0);