def demo_learning_curve():
 postag(incremental_stats=True, separate_baseline_data=True, learning_curve_output='learningcurve.png')

def demo_learning_curve ( ) : postag ( incremental_stats = True , separate_baseline_data = True , learning_curve_output = 'learningcurve.png' )
plot a learning curve -- the contribution on tagging accuracy of the individual rules .