The file artificial.pickle contains the data used in the artificial data
experiments reported in the ICA 2003 paper. The MEG data can be
obtained from the following webpage:

  http://www.cis.hut.fi/projects/ica/eegmeg/MEG_data.html

The part used in the experiments is a 2500 samples long sequence starting
at time index 8500 and ending at 11000.
