http://potterlab.bme.gatech.edu/development-data/simple-text/daily/spont/sparse/6-1-11.spk.txt.bz2 http://potterlab.bme.gatech.edu/development-data/simple-text/daily/spont/sparse/6-2-11.spk.txt.bz2 http://potterlab.bme.gatech.edu/development-data/simple-text/daily/spont/sparse/6-3-11.spk.txt.bz2