docs: def to_row(advice):
      '''Serialize an advice into a CSV row'''
      return [
          advice.id,
          advice.administration,
          advice.type,
          advice.session.year,
          advice.session.strftime('%d/%m/%Y'),
          advice.subject,
          ', '.join(advice.topics),
          ', '.join(advice.tags),
          ', '.join(advice.meanings),
          ROMAN_NUMS.get(advice.part, ''),
          advice.content,
      ]