Targeted Sentiment Analisys

Hi there, do we have in fast.ai or Pytorch any resources to do targeted sentiment analysis; like in this article:
https://towardsdatascience.com/targeted-sentiment-analysis-vs-traditional-sentiment-analysis-4d9f2c12a476 ?
Or anyone something about it at all? Many thanks.
I’m working on some scientific papers databases, looking to find papers with sentiments towards certain topics.