Here are below the companion notebooks for the blog post called "Build a custom entity recognizer using Amazon Comprehend" https://aws.amazon.com/blogs/machine-learning/build-a-custom-entity-recognizer-using-amazon-comprehend/
Notebooks:
First Notebook shows you how to train a custom entity recognizer from a list of smartphone devices.
Second Notebook shows you how to train a Word2Vec model using the twitter dataset.
Third Notebook leverages the keywords generated from the second notebook to create a custom sentiment classifier.