WordPress/wp-content/themes/twentyfourteen/page-templates/full-width.php

<?php
/**
 * Template Name: Full Width Page
 *
 * @package WordPress
 * @subpackage Twenty_Fourteen
 * @since Twenty Fourteen 1.0
 */

get_header(); ?>

<div id="main-content" class="main-content">

<?php
	if ( is_front_page() && twentyfourteen_has_featured_posts() )
		get_template_part( 'featured-content' );
?>

	<div id="primary" class="content-area">
		<div id="content" class="site-content" role="main">
			<?php
				while ( have_posts() ) :
					the_post();

					get_template_part( 'content', 'page' );

					// If comments are open or we have at least one comment, load up the comment template.
					if ( comments_open() || get_comments_number() )
						comments_template();
				endwhile;
			?>
		</div><!-- #content -->
	</div><!-- #primary -->
</div><!-- #main-content -->

<?php
get_sidebar();
get_footer();