Mark Farrell is a bioinformatics researcher at the Center for Research and Education on Aging who is using artificial intelligence to help understand the aging process. His work involves extracting knowledge from biomedical articles on aging to build a knowledge base that can describe and reason about the aging process. This involves techniques such as tokenization, parsing, and compilation to analyze text, extract facts, and represent the knowledge in a structured way. The extracted knowledge will help researchers understand the large and growing body of publications on aging.