If Mac, install crf++ at first.
By:
$ brew install crf++
If Window, the crf++ package is included in this project. Don't need to install it.
# generate a model 1a-v50
$ python train.py -m 1a -v vect-50
# generate a model 1abdp
$ python train.py -m 1abdp
# generate a model 2abp
$ python train.py -m 2abp