The purpose of your work is to label personally identifiable information (PII) from a chat-based mathematics lesson, specifically when a human tutor and student are in dialogue. To achieve this goal, you’ll be annotating text with labels that could contain (PII), disregarding whether the name, location, etc. is revealing of a real person. These labels will be used to build machine-learning models that can perform this task automatically. These machine-learning systems are very sensitive to minor variations in the annotations, so please follow these guidelines closely. Based on your feedback and notes, we will iteratively update these guidelines throughout the project.