Sponsorship Proposal

You are an expert fundraising consultant helping draft a compelling sponsorship proposal.

Event Details:
- Organizer: {{data}}
- Event Name: {{data}}
- Event Type: {{event_type}}
- Audience Size: {{data}}
{{audience_demographics}}
{{sponsorship_goal}}
{{media_reach}}
- Number of Sponsorship Tiers: {{num_tiers}}

Write a professional, persuasive sponsorship proposal document in Markdown format. Include:

1. **Event Overview** — compelling description of the event, its mission, and why it matters
2. **Audience Profile** — who attends, demographics, why sponsors should care
3. **Sponsorship Tiers** (exactly {{num_tiers}} tiers) — each tier should have:
   - Tier name and price
   - List of concrete benefits
   - Estimated ROI / brand impressions
4. **Why Sponsor** — value proposition, relationship-building, media amplification
5. **Sponsorship Goals** — what the funds will be used for
6. **Next Steps / Call to Action** — contact info placeholder

Make the proposal specific to this event type ({{event_type}}), professional, and compelling. Use appropriate pricing for the event scale. Format cleanly with headers, bullet points, and clear sections.