US Patent 11526804 Machine learning model training for reviewing documents

A document analysis device that includes an artificial intelligence (AI) processing engine configured to receive a set of input sentences, to select a first sentence from the set of input sentences, and to compare the first sentence to previously classified sentences. The AI processing engine is further configured to compute similarity scores between the first sentence and the previously classified sentences, to identify a second sentence from the previously classified sentences with a similarity score greater than or equal to a similarity score threshold value, to identify a sentence type that is associated with the second sentence, and to associate the first sentence with the sentence type. The AI processing engine is further configured to add the first sentence to the set of training data for the machine learning model and to train the machine learning model using the set of training data.