http://potterlab.bme.gatech.edu/development-data/simple-text/daily/spont/dense/2-1-3.spk.txt.bz2
http://potterlab.bme.gatech.edu/development-data/simple-text/daily/spont/dense/2-3-3.spk.txt.bz2
http://potterlab.bme.gatech.edu/development-data/simple-text/daily/spont/dense/2-4-3.spk.txt.bz2
http://potterlab.bme.gatech.edu/development-data/simple-text/daily/spont/dense/2-6-3.spk.txt.bz2
http://potterlab.bme.gatech.edu/development-data/simple-text/daily/spont/dense/4-1-3.spk.txt.bz2
http://potterlab.bme.gatech.edu/development-data/simple-text/daily/spont/dense/4-2-3.spk.txt.bz2