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'''''NOTE: '''''[https://keras.io/ Keras] package (with TensorFlow backend) is used for setting up the model
 
Some problems to consider for future implementation on the model:
* class label is highly imbalanced: o (not cohort) is way more than 1 (cohort) class
**may cause our model favoring the larger class, then the accuracy metric is not reliable
**several suggestions to fix this: A. under-sampling the larger class B.over-sampling the smaller class
===Workflow===
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