{% comment %}
    Inserts the position description of a person.
    
    Assumes that there is a variable "person" already defined.  
    It holds a key "position" and an associated value which is pasted here 
    verbatim.
    If the key is not present, an informative HTML comment will be inserted.
{% endcomment %}

{% assign person = include.person %}
{% if person %}
    {% if person.position %}
        <span class="position">
            {{ person.position }}
        </span>
    {% else %}
        <!-- 
            NOTE: team_card/position.html was included,
            but person.position was not defined 
        -->
    {% endif %}
{% else %}
    <!--
        WARNING: team_card/position.html was included, 
        but no person object was defined 
    -->
{% endif %}