http://potterlab.bme.gatech.edu/development-data/simple-text/daily/spont/small/6-2-25.spk.txt.bz2
http://potterlab.bme.gatech.edu/development-data/simple-text/daily/spont/small/6-3-25.spk.txt.bz2
http://potterlab.bme.gatech.edu/development-data/simple-text/daily/spont/small/6-4-25.spk.txt.bz2