For a working example, copy and paste these two URLs below into the text box above and click Mix Data:
For testing the Map view, try this URL:
If you want to paste in a URL to another type of data, put its mime type after its URL separated by a space, e.g.,
Supported mime types include: rdf/xml, n3, xls, bibtex.
Not sure what's going on? Watch this screencast first (65Mb).