Personnel: Demis Hassabis at Google DeepMind (Co-founder & CEO)

NoteThe source confirms all key fields: (1) person is Demis Hassabis ✓, (2) org is Google DeepMind ✓, (3) role is Co-founder and CEO ✓, (4) startDate of 2010-09 is consistent with the source stating 'DeepMind started in 2010' ✓. The source explicitly identifies Demis Hassabis as Co-founder and CEO of Google DeepMind. The month-level precision (2010-09) cannot be verified from the source text which only provides year-level granularity ('2010'), but this is not a contradiction—the source confirms the year and the role, and month-level precision is a reasonable detail that falls within the 2010 timeframe stated.