Using two hacks and a multinomial logistic regression model of n-grams with TF-IDF features, a pre-trained sentiment model can score the long-range sentiment of text of stories, books, and movies. The models do a reasonable job of summarizing the “shapes of stories” directly from text. This method can be easily extended to search across databases to find stories with similar plot shape as the query story.
"You've all heard the buzzwords...and they're real. Machine learning is a technology that can power the next industrial revolution. What the steam engine did for mechanical labor, machine learning is capable of doing for intellectual labor -- and indico is making it easier."