wp-thumbnails

                        <div class="entry_blog" itemprop="articleBody">

                        <?php if ( has_post_thumbnail() ) {the_post_thumbnail( 'large', array('class'=>'post_thumbnail_common', 'alt' => get_the_title() , 'title' => get_the_title(), 'itemprop'=>'image' ));} ?>

                        <p>test - now second thumbnail</p>
                        <?php the_post_thumbnail('large'); ?>
                        <?php the_content(); ?> <br>