Ask HN: Opportunities for Structured Data?

What are some verticals where building you own structured data could be a viable business?

I asked this 2.5 years ago and believe there is still plenty of opportunity following this model.

For example, here is the rough general model: * Identify a vertical with large number of distinct data sources * Create structure around the data * Make the data browseable and searchable * Allow users to supplement data with their own content (usually in the form of reviews/ratings/organization)

Growth model: * Expose smaller set of high quality pages * Gain first users by promoting in target market blogs/forums/news channels * SEO heavy * Expand when there is enough data coverage * Focus on utility first * Layer in social for added distribution

Here are some verticals with existing businesses that roughly follow this model: * Travel - TripAdvisor * Jobs - Indeed * Laywers - Avvo * Doctors - Avvo/Vitals * Movies - IMDB * Used Products - Priceonomics * Local - Yelp * Autos - CarGurus

What do you think are some good opportunities to apply the structured data biz model?

A few thoughts: * Disease / Medicine - It's still hard to get the information I want. * Schools / Degrees / Expected Career Success - Extremely hard to compare higher education schooling options.