{% for category in product[1].categories %}
• {{ category[1].title }} {% if category[1].maptopics %}
  {% for maptopic in category[1].maptopics %}
  • {{ maptopic[1].title }}
    {% for article in maptopic[1].articles %}
    • {{ article[1].title }}
    {% endfor %}
  {% endfor %}
  {% else %}
  {% for article in category[1].articles %}
  • {{ article[1].title }}
  {% endfor %}
  {% endif %}
{% endfor %}