Currently, there's no such distinction in the code, but there needs to be because the two would be treated differently, cfr T321822:

• Organizers can see participants' answers to these questions in the UI, only for events which they are an assigned organizer:
  • For answers to questions marked (PII) above: if and only if there are 10+ responses, responses will be pulled into an aggregate view. Organizers will NOT be able to view PII answers associated with usernames.
  • For answers to questions marked (not PII) above: regardless of response count, responses will be pulled into both the participant list (associated with usernames) AND the aggregate view.

Acceptance criteria

• The list of questions in the code differentiates between PII and non-PII questions.

Note: this will have no user-visible effect of any kind. This task is only about (transparently) introducing this distinction. Per above, user-facing effects will be visible when the aggregate view is implemented.