['not_bagus', 'hasil', 'cucian', 'masih', 'kotor']
['not_bad', 'at', 'all', 'the', 'clothes', 'were', 'clean']
plain words     : 10-fold accuracy 0.742 +/- 0.061
negation marked : 10-fold accuracy 0.779 +/- 0.081
mengecewakan       log-ratio -1.45  (pos 0, neg 3)
not_mengecewakan   log-ratio +0.63  (pos 1, neg 0)
good               log-ratio +1.88  (pos 6, neg 0)
not_good           log-ratio -1.16  (pos 0, neg 2)
