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