Meta AI (FAIR) — Founded By: sid_cMbVUVK29Q

NoteThe source is the official Meta AI Research page (https://ai.meta.com/research/). While it is about the correct entity (Meta FAIR), the source text provided contains only current research descriptions, project announcements, and research area overviews. It does not address the founding history or identify Yann LeCun (or any other founder) as the founder. The claim includes an opaque identifier (sid_cMbVUVK29Q) which cannot be verified from this source. To verify the claim, a source that explicitly discusses Meta FAIR's founding and founders would be required.