Parse a list of authors with Liquid templating. Handles single and multiple authors.

authors.html

{% assign authors = page.author %}
{% if authors %}
<p>By 
{% for author in authors %}
  {% if forloop.last and forloop.length > 1 %} and {% endif %}<span resource="{{ author.resource }}" typeof="Person" property="creator"><em property="rdfs:label">{{ author.name }}</em></span>{% if forloop.last == false and forloop.length > 2 %}, {% endif %}{% endfor %}.</p>
{% endif %}
</p>

authors.yml

---
author:
  - name: First Last
    resource: http://example.com/page/First_Last
  - name: First Last
    resource: http://example.com/page/First_Last
---