{% if article and article.author %} {% elif page and page.author %} {% else %} {% endif %} {% from '_includes/_defaults.html' import SITE_DESCRIPTION with context %} {% if SITE_DESCRIPTION %} {% endif %} {% block meta_tags_in_head %} {% from '_includes/_defaults.html' import GOOGLE_PLUS_PROFILE_URL with context %} {% if GOOGLE_PLUS_PROFILE_URL %} {% endif %} {% from '_includes/_defaults.html' import TWITTER_USERNAME with context %} {%if TWITTER_USERNAME %} {% endif %} {% endblock meta_tags_in_head %}