The Human and Civil Rights Collection is a new miner built with the Minerazzi platform. It is available at http://www.minerazzi.com/hcrc. To understand its capabilities, do a search for [ minnesota human rights library ]. Then find the result with the URL http://www1.umn.edu/humanrts/links/links.htm
Click the Search Inside icon at the right of this result to recrawl said result. By doing so, you already have access to almost the entire online collection of human rights resources from the University of Minnesota Library. By recursively using the Search Inside tool, you can keep discovering new resources.
You can do similar searches in large repositories like the Library of Congress. You just need to find said repository in the miner or as a secondary URL while recrawling.
The discovering and data mining capabilities of Minerazzi has prompted us to launch a new and ambitious project: The World Libraries Recrawl Project.