I confirm that the test is working in principle.
However, we probably need some licence
to use and distribute this data set if we want to include it into the
package. May be somebody here on this list has some hint for a place
that is more verbose about this and has a more sustainable place for
download than some (random?) dropbox folder.
I'd happily volunteer to do this split once we decide
about the data set - but if you want to do this as some packaging
training you are welcome to do it yourself (just let me know what you
prefere).