title: stanfordNER training does not recognize GPU present in the environment
body: <p>I have GPU(Tesla K80) present in the environment with CUDA installed. I am training stanfordNER on large data set with this Java command <code>java -Xms8g -cp stanford-corenlp-3.9.1.jar edu.stanford.nlp.ie.crf.CRFClassifier -prop self.trainPropFileName</code>.  (FYI, This command is being executed inside a python file with 'os'package (i.e) <code>os.system(cmd)</code>). </p>
  
  <p>During the training process CPU is being invoked instead of GPU. Can some one please suggest me an approach, so that GPU gets invoked. Thanks in advance.</p>