```php
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="https://gemengdkoorkruisverheffing.nl/wp-sitemap-index.xsl" ?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><sitemap><loc>https://gemengdkoorkruisverheffing.nl/wp-sitemap-posts-page-1.xml</loc></sitemap></sitemapindex>