https://stackabuse.com/python-for-nlp-multi-label-text-classification-with-keras/

https://medium.com/analytics-vidhya/an-introduction-to-multi-label-text-classification-b1bcb7c7364c

https://www.section.io/engineering-education/multi-label-classification-with-scikit-multilearn/

https://towardsdatascience.com/journey-to-the-center-of-multi-label-classification-384c40229bff

https://viblo.asia/p/multi-label-classification-cho-bai-toan-tag-predictions-oOVlY2Lr58W

https://www.nyckel.com/blog/multi-class-classification-vs-multi-label-classification-key-differences-how-to-choose/

Multi-label classification is a classification task in which a data sample can belong to many different classes (labels) concurrently.