OP here
I fine-tuned the deep learning neural network GPT2 from OpenAI, using this [Google Colab notebook](
https://colab.research.google.com/drive/1VLG8e7YSEwypxU-noRN...) by Max Woolf and using these [130 thousand real wine reviews](
https://www.kaggle.com/zynicide/wine-reviews) collected by Zack Thoutt.