{% assign author = page.by -%}
{% if page.categories contains 'project' -%}
{% for project in site.projects -%}
{% if page.tags contains project.tag -%}
{% capture author %}{%for c in project.contact %} {{c}}{% if forloop.last != true %},{% endif %}{% endfor %}{% endcapture %}
{% endif -%}
{% endfor -%}
{% endif -%}
{% if author and author != '' -%}
Von {{author}}
{% else -%}
Chaotikum e.V.
{% endif -%}