How to make use of POS tags as useful features for a NaiveBayesClassifier for sentiment analysis?
There are so many ways you could go about this. For starters, you could use Conditional Random Fields (CRF). There is a sweet implementation in Python. In which you can set the POS features and more. There is a website from the same source you posted on how to use CRF for your purpose (I have not read it thoroughly). Spacy is another great resource to get all the features that you need fast. Nonetheless, for SOTA you will need some NN implementations.