Develop a chain of prompts to systematically identify untapped opportunities for new AI tools.  Start with brainstorming 5 unmet needs within a specific niche (e.g., sustainable fashion, personalized education). For each unmet need, generate 3 potential AI-powered solutions, detailing their core functionality and target user. Then, for each solution, outline a concise business model canvas, including key partners, revenue streams, and cost structure. Finally, prioritize the top 2 most promising AI tool opportunities based on market size, ease of execution, and potential ROI.  Output should be structured as a table with columns for: Unmet Need, AI Solution, Target User, Key Partners, Revenue Streams, Cost Structure, and Priority Score (1-10, 10 being highest).