I don't have sufficient information to provide a comprehensive biography of Greg Beeden based on the search results provided. The only relevant reference found is a brief mention in a University Challenge article, which indicates that Greg Beeden was part of a team that competed on the quiz show against the London School of Economics[4]. However, this single reference does not provide enough detail about his background, education, career, achievements, or current activities to construct a meaningful 300-word biography. To provide you with an accurate and detailed biography of Greg Beeden, I would need access to more comprehensive sources that cover his professional background, educational history, career accomplishments, and current work or roles. If you have additional information about which Greg Beeden you're interested in learning about (for example, his profession, field of work, or geographic location), that would help clarify the search and potentially yield more relevant results.