This works for me, however, instead of looking for the device `TPPS/2 Elan Trackpoint`, I had to use the id of `TrackPoint Keyboard 2`. The downside of this fix is that pasting with the middle button does not work anymore.
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Comment: 82 pages (including many pages of tables), 8 multi-part figures,
"Facebook100" data used in this paper is publicly available at
http://people.maths.ox.ac.uk/~porterm/data/facebook100.zip.
C. Cattuto, D. Benz, A. Hotho, und G. Stumme. The Semantic Web - ISWC 2008, Volume 5318 von Lecture Notes in Computer Science, Seite 615--631. Springer Berlin / Heidelberg, (2008)
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