Reference https://towardsdatascience.com/comprehensive-guide-on-multiclass-classification-metrics-af94cfb83fbd https://www.youtube.com/watch?v=xq8qFB_B_oU https://towardsdatascience.com/multi-class-metrics-made-simple-the-kappa-score-aka-cohens-kappa-coefficient-bdea137af09c
