Facebook’s Chief Technology Officer Mike Schroepfer is stepping down from the social media company, taking on a part time role while longtime executive Andrew Bosworth will replace him next year.

Facebook said Thursday that it is paying for the creation of its own deepfake videos, which will be used to make a data set. Facebook is commissioning its own deepfake videos as part of a competition it's sponsoring, called the Deepfake Detection Challenge, which will offer grants and awards in an effort to spur participation from AI researchers. The videos will be made with paid actors who understand that they'll be part of a manipulated-video data set, Facebook chief technology officer Mike Schroepfer told reporters on Wednesday. Facebook plans to release the data set in December. Schroepfer said Facebook is "figuring out in parallel" what its rules regarding misinformation in general and deepfakes in particular should be.