Yup, worked on this very data problem (bad data sources, especially gov) for a long time, but gave up as I didn't see it as the road to riches. At the end I hit

Yup, worked on this very data problem (bad data sources, especially gov) for a long time, but gave up as I didn't see it as the road to riches. At the end I hit upon an AI solution I'm sure will work, but I never finished it, still on the shelf, though.